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backtesting

100 / 100 · Low risk

Fine to try.

By nimadorostkar/Claude-Skills-collection (GitHub) · coding · 36 stars · scanned at commit 1691932

Use when testing a trading strategy on historical data. Covers the biases that make a backtest lie, realistic costs, walk-forward validation, and the statistics that distinguish an edge from a coincidence. Trigger on "backtest this strategy", "my backtest looks too good to be true", "why does live trading underperform my backtest". Do not use for testing whether a single signal is statistically significant — see the quantitative-analysis skill.

Works with any agent that supports SKILL.md skills.

What this skill can do

We found nothing in the files we read that matches our rules. That does not prove the skill is safe: see the limits of static scanning.

Install

Paste this into your terminal. It downloads exactly the version we scanned, not whatever is newest.

if [ -e ~/.agents/skills/'backtesting' ] || [ -L ~/.agents/skills/'backtesting' ]; then echo 'A skill folder named backtesting already exists — not replacing it' >&2; false; else d=$(mktemp -d) && git clone --quiet --filter=blob:none --no-checkout 'https://github.com/nimadorostkar/Claude-Skills-collection' "$d" && git -C "$d" checkout --quiet '1691932edc17063d712a85d02bcc7a1cd3791057' -- 'skills/finance/backtesting' && mkdir -p ~/.agents/skills && cp -R "$d"/'skills/finance/backtesting' ~/.agents/skills/'backtesting' && rm -rf "$d"; fi

Codex reads ~/.agents/skills directly. For Claude Code, Cursor, Copilot, Gemini CLI, Antigravity or OpenCode, also link it. For Claude Code: ln -s ~/.agents/skills/'backtesting' ~/.claude/skills/'backtesting' (other agents: ~/.cursor/skills, ~/.copilot/skills, ~/.gemini/skills, ~/.gemini/config/skills, ~/.config/opencode/skills). Or install through the finder skill, which does both.

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