How to Read Indicator Performance Properly

A shiny backtest doesn't mean a shiny live account. Most retail traders fall into the same trap: they optimize an indicator on historical data, see a flattering equity curve, and assume the edge is real. Then live trading shreds the account within two months. This calculator exists to force you to look at the metrics that actually matter.

1. Profit Factor Over Win Rate

Win rate alone is meaningless. A 75% win rate system with 1:0.3 reward-to-risk is worse than a 40% win rate system with 1:3 reward-to-risk. Profit factor (gross profit / gross loss) normalizes this. Under 1.25 is noise. 1.5 is the minimum to survive real-world friction. Above 2.0 is rare and usually curve-fit.

2. Expectancy Is the Only Number That Pays You

Expectancy = (Win Rate ร— Avg Win) - (Loss Rate ร— Avg Loss). It tells you, in R units, what each signal is worth on average. A positive expectancy of 0.3R means every trade earns you a third of your risk on average. Over 300 trades, that's 90R. Over 1000 trades, 300R. That's how professionals think.

3. Sharpe and Sortino โ€” The Volatility-Adjusted Reality Check

A system that makes 40% per year with 5% max drawdown is completely different from a system that makes 40% per year with 40% drawdown. Sharpe ratio (return / std deviation) and Sortino ratio (return / downside deviation) quantify the path of the returns, not just the destination. Above 1 is good. Above 2 is professional-grade. Above 3 is suspicious (usually fit).

4. Max Drawdown Is the Only Thing That Kills You

Your account dies from drawdowns, not from bad averages. A 35% drawdown requires 54% to recover. A 50% drawdown requires 100%. Any indicator strategy with historical drawdown above 25% should be position-sized aggressively lower, because live drawdowns tend to exceed backtest drawdowns by 30-50%.

5. Indicator Confluence โ€” Myth vs Reality

The naive idea is "add more indicators, get higher win rate." The reality is more subtle. Stacking two indicators that measure the same thing (RSI + Stochastic, both momentum) mostly reduces signal count without improving edge. The combos that actually work mix different dimensions: MA (trend) + RSI (momentum) + ATR (volatility filter). Each indicator answers a different question about the market.

6. Why Your Indicator Will Stop Working

Markets regime-shift. An indicator that crushed EUR/USD in 2019-2021 (low volatility, clean ranges) got murdered in 2022 (high volatility, strong trends). The indicator wasn't wrong โ€” the environment changed. The solution is not to abandon the indicator, but to understand in which regime it works and gate it with a regime filter (typically an ATR or ADX threshold).

7. The 100-Trade Minimum

Any backtest with fewer than 100 trades is a story, not statistics. You need at least 100 trades to have any confidence interval at all, and 300+ to trust the results. Pair that with walk-forward analysis (test on out-of-sample data) and you're closer to something tradeable.