How to test a trading strategy without fooling yourself.
Guides to forex backtesting, walk-forward validation and the specific ways a backtest flatters you — plus findings from our own archive, including a volume filter we tested, could have sold, and did not ship because it did not work.
Start here
The head questions, answered properly.
Forex Backtesting: How to Test a Strategy Without Fooling Yourself
How forex backtesting works, the five ways a backtest quietly lies to you, and the checks that separate a real edge from a curve fit. For traders who want a verdict, not a pitch.
AI Forex Backtesting: What It Actually Does, and What It Cannot Do
What AI genuinely contributes to forex backtesting — rule generation, parameter search, pattern discovery — and the specific claims to distrust when a tool says it found an edge.
Best Forex Backtesting Software in 2026: An Honest Comparison
A candid comparison of forex backtesting software — MT5 Strategy Tester, Forex Tester, QuantConnect, StrategyQuant and TradingView — including where each one genuinely beats the others.
How to Backtest a Forex Strategy Without Writing Code
A practical route from a strategy you can describe in a sentence to a graded out-of-sample result, with no programming — and an honest account of what the no-code approach costs you.
Platform comparisons
Where the alternatives are genuinely better, and where they are not.
QuantConnect vs QuantParadox: Which Fits Your Forex Research?
An honest side-by-side for forex research — coding requirements, asset coverage, out-of-sample defaults and live execution, including where QuantConnect is plainly the better platform.
LEAN, Backtrader, VectorBT or a Hosted Platform: Which Backtesting Engine?
Open-source backtesting engines like LEAN, Backtrader and VectorBT versus hosted platforms — what running your own engine actually costs in time, and when the control is worth it.
MT5 Strategy Tester: What It Does Well and Where It Misleads
An honest assessment of MetaTrader 5's Strategy Tester — modelling quality, broker data variance, the out-of-sample gap, and when a dedicated backtester is worth it.
TradingView Backtesting: What Pine Script Results Do and Don't Tell You
What TradingView's Pine Script strategy tester measures well, where its intrabar assumptions flatter results, and how to sanity-check a strategy report before trusting it.
Method
The checks that separate a real edge from a curve fit.
Walk-Forward Optimization in Forex: The Only Test That Survives Contact
What walk-forward optimization is, how to choose window sizes, and why an in-sample-only backtest tells you almost nothing about how a strategy will behave next month.
Overfitting in Forex: How Beautiful Backtests Get Manufactured
How curve-fitting produces spectacular backtests that fail live, the specific signs that reveal it, and why the number of variants you tested belongs in the verdict.
Is My Trading Edge Real, or Am I Just Lucky?
How to tell whether a run of profitable trades reflects a genuine edge or ordinary variance, how many trades it takes to know, and why most track records are far too short to say.
Spread and Slippage: The Costs That Decide Whether an Edge Exists
Why realistic cost modelling flips more backtest verdicts than any other factor, how to set spread and slippage assumptions, and what a zero-cost backtest is really telling you.
The Backtest Metrics That Lie to You
Why win rate, profit factor and Sharpe ratio routinely mislead when read without sample size and context — and the small set of numbers actually worth reading first.
How Much Historical Data Do You Need to Backtest Forex?
How much price history a forex backtest actually requires, why bar count matters more than calendar years, and the data-depth traps that silently shorten your test window.
Position Sizing Changes Your Backtest More Than Your Entry Does
Why position sizing dominates backtest outcomes, the difference between fixed-lot and risk-based sizing, and how sizing choices quietly rewrite the result of an unchanged strategy.
Backtesting for a Prop Firm Challenge: Testing the Rules, Not Just the Edge
Why passing a prop firm evaluation is a different problem from having a profitable strategy, and how to test against daily loss limits, trailing drawdown and consistency rules.
What we measured
Findings from our own archive — including the ones that went against us.
We Tested Whether Volume Filters Improve Forex Setups. They Did Not.
A decade-scale test of whether requiring above-average volume improves forex setup performance. The result went against a feature we could have sold, so we published it.
Does Session Timing Change Forex Setup Performance? We Measured It
What a decade of minute data says about the same setup across Asian, London and New York hours — and why session is one of the few filters that survives testing.
Head-to-head comparisons
Seven full comparisons, each checked against the other product's own published documentation, and each with a section naming the cases where they are the better tool.
Reading about backtesting is not backtesting.
Describe a strategy in a sentence, or paste your own code, and get the out-of-sample verdict on ten years of minute data. Five full backtests free, no card.