Petr Kostal / Profilo

Petr Kostal — algorithmic trading developer, Czech Republic.

I trade on live accounts myself, so I build EAs the way I'd want to run them.

What I build:
• Expert Advisors and indicators for MetaTrader 4 and 5 (MQL4 / MQL5)
• A written strategy turned into a configurable EA — everything adjustable sits in the inputs
• Risk management: ATR stops, break-even, partial closes, trailing, daily loss limits, drawdown protection, prop-firm rule sets
• Fixing, auditing and explaining existing EA code, including code from AI tools and no-code builders
• Backtesting and optimisation in the Strategy Tester on real tick data

Also:
• Python — MT5 bridges, data analysis, backtesting tools, log and latency analysis
• C++ — MQL is C++ based; I work in both

How I work: I ask before I code. You get the full source, commented and unlocked. I test on real ticks before I hand it over. If I think your idea won't do what you expect, I say so first.

I don't promise a profit factor, a win rate or a monthly return. Nobody can do that honestly.

You can check my work: two EAs in the MQL5 Market — Gorilla UltimateBeast Forex and GorillaBeast ScalperPro Gold2 — and a MetaTrader 5 signal, ThreeD Bet Forex MAX, running on a real account since March 2026. More EAs are in development.

I'm new to Freelance and my rating here is empty. I'd rather say that than hide it.