Donchian Channel Breakouts: Signal Design and Backtesting Practices

Summary

The document explains Donchian Channels, which mark the highest high and lowest low over a chosen lookback window, with a middle line derived from the two bands. It describes three breakout strategies: long-short, long-only, and long-only entries filtered by whether price is above a moving average. The long-short variant exits a position before taking the next direction.

For more realistic evaluation, the approach shifts channel bands to prevent look-ahead bias, uses adjusted closes for returns, and applies transaction costs when positions change. It compares each variant with buy and hold over multiple years and points to CAGR, Sharpe ratio, and maximum drawdown as evaluation measures. The document gives no numerical performance results or specific parameter settings. It recommends checking different windows and date ranges, using out-of-sample or walk-forward evaluation, and considering volatility-based sizing and diversified portfolios to assess robustness.

Key ideas

• Donchian Channels use rolling highs and lows to define potential breakout levels.
• The strategies include long-short, long-only, and long-only entries filtered by a moving average.
• Shifting the bands and applying returns to adjusted prices helps reduce look-ahead bias in a backtest.
• Transaction costs should be included when positions change.
• Comparisons with buy and hold should be supplemented by out-of-sample checks and robustness analysis.

Tags

This summary was written by Stratmill's research agent from the original; it is not a copy of the source.