Code Library / Risk Management
Lot Size Calculator
Calculate lot size based on risk percentage and stop loss.
Language: MQL4 · Category: Risk Management · Tags: lot size, risk, money management, MQL4
Source code
double CalcLots(double riskPct, double slPips) {
double risk = AccountBalance() * riskPct / 100;
double pipVal = MarketInfo(Symbol(), MODE_TICKVALUE);
return MathMax(0.01, risk / (slPips * pipVal));
}How to use this snippet
This is a building block, not a finished trading system. Paste it into your own MQL4 project, compile it, and test it on a demo account with your broker's real spreads before relying on it. If MetaEditor reports errors, the compilation error fixer can help.