Update README.md

README.md

@@ -66,12 +66,15 @@ This is a pre-release in alpha stage. The app is still under heavy development.
   * [Workspace](#workspace)
   * [Definitions](#definitions)
     * [Trading System](#trading-system)
-  * [Element's Menu](#elements-menu)
-  * [Detachment and Attachment of Elements](#detachment-and-attachment-of-elements)
+  * [Interface](#interface)
+    * [Element's Menu](#elements-menu)
+    * [Detachment and Attachment of Elements](#detachment-and-attachment-of-elements)
   * [Working with Strategies](#working-with-strategies)
     * [Situations and Conditions](#situations-and-conditions)
       * [Comparison and Logical Operators](#comparison-and-logical-operators)
     * [Starting a Strategy from Scratch](#starting-a-strategy-from-scratch)
+      * [Trigger Stage](#trigger-stage)
+      * [Open Stage](#open-stage)
     * [Using an Existing Strategy](#using-an-existing-strategy)
   * [Available Variables](#available-variables)
     * [Candles](#candles)