Bohdan Klok / Profilo

I debug, finish and audit MetaTrader robots — MQL5 and MQL4.

Most of my work is on code somebody else wrote: an EA that behaves differently live than in the Strategy Tester, an indicator that repaints, a TradingView/Pine strategy that has to run in MetaTrader. I read the existing code and report what I found before I change anything.

Recent audit: 55,000 lines of trading code, 9 critical defects found — including a live execution path that silently differed from the backtested one.

What I check by default, because this is where robots quietly lose money:
• lot size normalised to the symbol's min/max/step, so orders aren't rejected
• stop distance validated against the broker's stop level
• logic gated on bar close, not every tick, so tester and live agree
• every order result checked by retcode, never assumed
• netting vs hedging behaviour stated explicitly

I work on: Forex and metals EAs · indicators and panels · MT4 to MT5 and Pine to MQL5 conversion · risk modules (position sizing, daily loss limits, prop-firm rules) · Python-MetaTrader bridges and data export · walk-forward validation and honest statistics.

I verify numbers independently: I export the terminal's own data and recompute the result in Python/pandas, so a disputed indicator value has a second, independent calculation to compare against rather than my word.

I have also built production trading infrastructure for Binance Futures in Python — order execution, rate-limit control, a two-level kill switch, and an event-sourced backtester where backtest and live run the same code.

I trade myself, so I read a specification the way the person who will run the robot reads it — and I will tell you if something in it is going to cost you money.

I do not sell or promise profitable strategies. I write the code that executes yours, and I say so in writing before we start.

I agree the specification in detail before starting, show progress at every stage, and deliver documented code.

My own products on the Market: Indicator Signal Trader Kb turns the signals of any MT5 indicator into an Expert Advisor without coding - you choose the indicator and the buffer, up to four more indicators can filter the signals, with risk-based lot, ATR stop loss, break-even, trailing stop and alerts. Indicator Signal Alerts Kb is free and sends the alerts only. Setup videos are on my YouTube channel (link above).

MQL5 · MQL4 · C++ · Python/pandas · Strategy Tester · Git