Every experienced trader has a folder of half-finished ideas. Strategy templates are how you stop re-implementing the same moving-average crossover for the tenth time — provided you treat the template as a first draft with an audit trail, not as an answer.
What makes a template worth using
- ▸Complete rules, not pseudocode. Entry, exit, sizing, and the data it needs should all be present and readable. A template you cannot inspect is a template you cannot trust when it loses money.
- ▸A category you can reason about. Trend-following, mean-reversion, momentum, volatility, and event-driven strategies fail in different ways. Knowing which family a template belongs to tells you what to stress-test first.
- ▸Room to adapt. Parameters should be exposed and bounded so you can fit the template to your instruments — with a holdout kept back so the adaptation is measured, not assumed.
- ▸A path to realism. The template should survive the move from a fast approximation to an order-by-order simulation with costs. If it only works in the cheap test, it was never a strategy.
How to use one without fooling yourself
Start by running the template untouched on your instruments. That baseline tells you whether the idea has any life before you touch a parameter. Then adapt — bounded, with a holdout — and compare against the baseline rather than against zero. Finally, validate out-of-sample with walk-forward testing and check the overfitting grade: the point of adapting is to fit your market, not to fit its noise.
The discipline is simple to state and hard to keep: a template is evidence about an idea, and your modifications are hypotheses that still owe their proof. The traders who use templates well are the ones who keep asking which parts of the result came from the template and which parts came from them.