MetaTrader 5 (MQL5) Indicators

Three custom MT5 indicators for visual/manual chart reference — ports of this project's TradingView Pine Script indicators (see README_pinescript.md) and, where applicable, bot.py's own indicator functions. None of these feed the trading bot itself; test_bot() computes everything it needs directly in Python via add_indicators().

These were written without access to a compiler — verify each compiles cleanly in MetaEditor before running it live, and report back if you hit any errors.

Why three files instead of one

MT5 has a hard constraint Pine Script shares: one indicator can draw to the main chart window OR one separate sub-window, never both. That's why ADX_Stochastic_Choppiness.mq5 is separate from the two chart-overlay files — it can't be merged in.

HalfTrend.mq5 — standalone HalfTrend (chart overlay)

The original, minimal port — just the trailing trend-flip line, colored lime (bullish) / orange (bearish). Uses SMA-smoothed high/low internally (ta.sma equivalent), matching bot.py's current HalfTrend().

Input	Default	Purpose
Amplitude	2	Lookback for the high/low EMA and highest-high/lowest-low range

ADX_Stochastic_Choppiness.mq5 — sub-window oscillator

ADX/+DI/-DI (blue/lime/red), a double-EMA-smoothed Stochastic %K/%D (aqua/red — hand-rolled rather than using MT5's built-in iStochastic, since that smooths with SMA by default and wouldn't match the Pine script's ta.ema-based smoothing), and the Choppiness Index (orange, same formula as bot.py's ChoppinessIndex()). Reference levels at 80/20 (stochastic) and 61.8/38.2 (Choppiness choppy/trending thresholds) are drawn automatically.

Input	Default	Purpose
DI Length	14	True range / +DM / -DM Wilder smoothing length for +DI/-DI
ADX Smoothing	14	Separate Wilder smoothing length for ADX itself (from DX)
%K Length	5	Raw stochastic %K lookback
K Smoothing	3	EMA smoothing period applied to raw %K
D Smoothing	3	EMA smoothing period applied to smoothed %K to get %D
Choppiness Length	14	Lookback for both the true-range sum and the highest/lowest range

Installation

1. Copy the .mq5 file(s) into your MT5 data folder's MQL5/Indicators/ directory (or open them directly in MetaEditor via File → Open).
2. Compile (F7 in MetaEditor) — check the Errors tab for any compile issues.
3. In MT5, drag the compiled indicator from the Navigator panel onto your chart.
4. Adjust inputs from the indicator's Properties dialog (Inputs tab) as needed.

Reading the Choppiness Index

Same as the Pine Script README: >61.8 is traditionally "choppy," <38.2 "trending," but on your actual XAUUSD 1-minute data the real distribution sits much tighter around the mean (~49.3, 25th-75th percentile 42.7-56.1) than those textbook levels suggest — don't expect the 61.8/38.2 lines to fire constantly at this timeframe.