A small green pop that fades was round-tripping to -1R because the gain
protection only arms at +5% / +1R — SOFI peaked +2.6% (+$281), never reached a
threshold, and gave it all back (stop never moved off the original). Add a
step-trail that ratchets the stop up from entry in step-R increments: at +0.25R
the stop is at breakeven, +0.5R -> +0.25R, +0.75R -> +0.5R, ... It locks a small
pop AND keeps climbing under a runner.
Implemented in the shared _trail_stop (so backtest simulate_exit and live
manage_live agree); risk is recovered from reached_r so it needs no new args;
only ratchets up (max-of-all with the prior-low trail / profit-locks).
TRADING_EXIT_TRAIL_R_STEP (default 0, set 0.25 in .env). Supersedes the interim
standalone +2% breakeven, which reverts to its 0.05 default backstop.
Tests: the ratchet ladder (below-step=no move, +0.25R->BE, +0.5R->+0.25R,
ratchets-up-only) and an end-to-end pop-then-fade that now exits +0.25R instead
of round-tripping to a loss.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
