304 lines
11 KiB
JavaScript
304 lines
11 KiB
JavaScript
exports.newTradingSystem = function newTradingSystem(bot, logger, tradingEngineModule) {
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/*
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The Trading System is the user defined set of rules compliant with the Trading Protocol that
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defines the trading logic to be applied during each cycle of the Simulation.
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*/
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const MODULE_NAME = 'Trading System'
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let thisObject = {
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mantain: mantain,
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reset: reset,
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run: run,
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updateChart: updateChart,
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initialize: initialize,
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finalize: finalize
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}
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let chart
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let tradingSystem
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let tradingEngine
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let sessionParameters
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const TRADING_STAGES_MODULE = require('./TradingStages.js')
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let tradingStagesModule = TRADING_STAGES_MODULE.newTradingStages(bot, logger, tradingEngineModule)
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return thisObject
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function initialize() {
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tradingSystem = bot.simulationState.tradingSystem
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tradingEngine = bot.simulationState.tradingEngine
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sessionParameters = bot.SESSION.parameters
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tradingSystem.conditions = new Map()
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tradingSystem.formulas = new Map()
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tradingStagesModule.initialize()
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/* Adding Functions used elsewhere to Trading System Definition */
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tradingSystem.checkConditions = function (situation, passed) {
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/* Given a Situation, we check if all children conditions are true or not */
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for (let m = 0; m < situation.conditions.length; m++) {
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let condition = situation.conditions[m]
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let value = false
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if (tradingSystem.conditions.get(condition.id) !== undefined) {
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value = tradingSystem.conditions.get(condition.id)
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}
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if (value === true) {
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tradingSystem.highlights.push(condition.id)
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}
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else {
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passed = false
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}
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tradingSystem.values.push([condition.id, value])
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}
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return passed
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}
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tradingSystem.evalConditions = function (startingNode, descendentOfNodeType) {
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evalNode(startingNode, 'Conditions', descendentOfNodeType)
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}
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tradingSystem.evalFormulas = function (startingNode, descendentOfNodeType) {
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evalNode(startingNode, 'Formulas', descendentOfNodeType)
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}
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function isItInside(elementWithTimestamp, elementWithBeginEnd) {
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/*
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The function is to allow in Conditions and Formulas to easily know when an element with timestamp (like the ones of single files) are inside the time range
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of an element with a time range, like a candle.
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*/
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if (elementWithTimestamp.timestamp >= elementWithBeginEnd.begin && elementWithTimestamp.timestamp <= elementWithBeginEnd.end) {
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return true
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} else {
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return false
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}
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}
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}
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function finalize() {
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tradingStagesModule.finalize()
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tradingStagesModule = undefined
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chart = undefined
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tradingSystem.conditions = undefined
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tradingSystem.formulas = undefined
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tradingSystem.highlights = undefined
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tradingSystem.errors = undefined
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tradingSystem.values = undefined
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tradingSystem.status = undefined
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tradingSystem.progress = undefined
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tradingSystem.running = undefined
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tradingSystem = undefined
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tradingEngine = undefined
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sessionParameters = undefined
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}
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function mantain() {
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tradingStagesModule.mantain()
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}
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function reset() {
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tradingStagesModule.reset()
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tradingSystem.highlights = []
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tradingSystem.errors = []
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tradingSystem.values = []
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tradingSystem.status = []
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tradingSystem.progress = []
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tradingSystem.running = []
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tradingSystem.announcements = []
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}
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function updateChart(pChart) {
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chart = pChart // We need chat to be a local object accessible from conditions and formulas.
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tradingStagesModule.updateChart(pChart)
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}
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async function run() {
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try {
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/* Run the Trigger Stage */
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tradingStagesModule.runTriggerStage()
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/* Run the Open Stage */
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await tradingStagesModule.runOpenStage()
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/* Run the Manage Stage */
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tradingStagesModule.runManageStage()
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/* Run the Close Stage */
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await tradingStagesModule.runCloseStage()
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} catch (err) {
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/*
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If an error ocurred during execution, it was alreeady logged and
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included at the errors array. That means we need to do nothing here,
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just prevent the execution to be halted for not handling exceptions.
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*/
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if (typeof err === 'string' || err instanceof String) {
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logger.write(MODULE_NAME, '[ERROR] runExecution -> err = ' + err)
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}
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if (err.stack !== undefined) {
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logger.write(MODULE_NAME, '[ERROR] runExecution -> err = ' + err.stack)
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}
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}
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}
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function evalNode(node, evaluating, descendentOfNodeType, isDescendent) {
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if (node === undefined) { return }
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/* Verify if this node is decendent of the specified node type */
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if (isDescendent !== true) {
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if (node.type === descendentOfNodeType) {
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isDescendent = true
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}
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}
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/* Here we check if there is a codition to be evaluated */
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if (node.type === 'Condition' && evaluating === 'Conditions') {
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/* We will eval this condition */
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if (isDescendent === true) {
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evalCondition(node)
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}
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}
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/* Here we check if there is a formula to be evaluated */
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if ((node.type === 'Formula' || node.type === 'Announcement Formula') && evaluating === 'Formulas') {
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if (node.code !== undefined) {
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/* We will eval this formula */
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if (isDescendent === true) {
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evalFormula(node)
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}
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}
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}
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/* Now we go down through all this node children */
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let nodeDefinition = bot.APP_SCHEMA_MAP.get(node.type)
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if (nodeDefinition === undefined) { return }
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if (nodeDefinition.properties !== undefined) {
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let previousPropertyName // Since there are cases where there are many properties with the same name,because they can hold nodes of different types but only one at the time, we have to avoind counting each property of those as individual children.
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for (let i = 0; i < nodeDefinition.properties.length; i++) {
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let property = nodeDefinition.properties[i]
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switch (property.type) {
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case 'node': {
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if (property.name !== previousPropertyName) {
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if (node[property.name] !== undefined) {
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evalNode(node[property.name], evaluating, descendentOfNodeType, isDescendent)
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}
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previousPropertyName = property.name
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}
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break
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}
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case 'array': {
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if (node[property.name] !== undefined) {
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let nodePropertyArray = node[property.name]
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for (let m = 0; m < nodePropertyArray.length; m++) {
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evalNode(nodePropertyArray[m], evaluating, descendentOfNodeType, isDescendent)
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}
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}
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break
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}
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}
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}
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}
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}
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function evalCondition(node) {
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let value
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let error
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/*
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The code can be at the condition node if it was done with the Conditions Editor, or it can also be
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at a Javascript Code node. If there is a Javascript object we will give it preference and take the code
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from there. Otherwise we will take the code from the Condition node.
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*/
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let code = node.code
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if (node.javascriptCode !== undefined) {
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if (node.javascriptCode.code !== undefined) {
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code = node.javascriptCode.code
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}
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}
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try {
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logger.write(MODULE_NAME, '[INFO] evalCondition -> code = ' + code)
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value = eval(code)
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} catch (err) {
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/*
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One possible error is that the conditions references a .previous that is undefined. This
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will not be considered an error.
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*/
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value = false
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if (code.indexOf('previous') > -1 && err.message.indexOf('of undefined') > -1
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) {
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/*
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We are not going to set an error for the casess we are using previous and the error is that the indicator is undefined.
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*/
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} else {
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error = err.message
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}
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}
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tradingSystem.conditions.set(node.id, value)
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if (value === true) {
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tradingSystem.highlights.push(node.id)
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}
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if (error !== undefined) {
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tradingSystem.errors.push([node.id, error])
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}
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if (value !== undefined) {
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tradingSystem.values.push([node.id, value])
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}
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logger.write(MODULE_NAME, '[INFO] evalCondition -> value = ' + value)
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logger.write(MODULE_NAME, '[INFO] evalCondition -> error = ' + error)
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}
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function evalFormula(node) {
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let value
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let error
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try {
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logger.write(MODULE_NAME, '[INFO] evalFormula -> code = ' + node.code)
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value = eval(node.code)
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} catch (err) {
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/*
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One possible error is that the formula references a .previous that is undefined. This
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will not be considered an error.
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*/
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value = 0
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if (node.code.indexOf('previous') > -1 && err.message.indexOf('of undefined') > -1
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) {
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/*
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We are not going to set an error for the casess we are using previous and the error is that the indicator is undefined.
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*/
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} else {
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error = err.message
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}
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}
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if (error !== undefined) {
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tradingSystem.errors.push([node.id, error])
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return
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}
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if (value !== undefined) {
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if (node.type === 'Formula' && isNaN(value)) {
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tradingSystem.errors.push([node.id, 'Formula needs to return a number.'])
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return
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}
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tradingSystem.values.push([node.id, value])
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tradingSystem.formulas.set(node.id, value)
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}
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logger.write(MODULE_NAME, '[INFO] evalFormula -> value = ' + value)
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logger.write(MODULE_NAME, '[INFO] evalFormula -> error = ' + error)
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}
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}
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