How to Use a Forex Strategy Tester to Evaluate Trading Rules
A forex strategy tester, whether MetaTrader's built-in one, a platform's replay mode or a spreadsheet, is only as honest as the setup it is given. This guide walks through the setup that produces a trustworthy result: data quality and the modelling mode, spread and slippage, the parameters to fix before the run, the report metrics that predict live performance and the ones that mislead, and the optimisation trap that turns a tester into a fitting machine.