Most retail backtests quietly overstate results. They skip commission drag and execution slippage, and they test on a conveniently profitable window.

Honest Backtest Toolkit gives you the method and the tools to check your own numbers in minutes.

What you get

• Trading Journal (Google Sheets): net P&L after commission and slippage, R-multiple, expectancy, drawdown, monthly and per-setup results, equity curve
• Position Size & Commission Calculator (Google Sheets): risk-based position size, round-trip cost, break-even win rate before and after costs
• Backtest Analyzer (Google Sheets): paste your trade list and see the same backtest as exported vs after costs, plus the break-even cost per trade
• Backtest window registry template and the “5 ways your backtest is lying to you” checklist
• Case study: how percentage commission wiped out a tight ATR stop in a live bot (in our case the costs took most of the edge)

Who it’s for

Stock traders and bot builders who want to know what is left after costs.

How it works

Open each Google Sheet link, make your own copy (File > Make a copy), enter your fee schedule. Takes about 5 minutes. A free Google account is needed.

Track record: 4 confirmed fixes

Educational material, not financial advice. Sample trades in the files are hypothetical.