# LINT_FIT_FULL_HISTORY

A model is fitted on the whole history inside compute(), so early bars learn from later ones.

## What happened

`compute()` receives the whole history at once. A model fitted there has seen every bar, so the values it gives for early bars were shaped by bars that came after them.

## What to do

Fit on a window that ends before the bar being decided, and fit again as the window moves.

## Example

```text
strategy.py, line 31: A model is fitted on the whole history inside compute(), so early bars learn from later ones. [LINT_FIT_FULL_HISTORY]
```

The wording of the message depends on your file, and the code does not. A warning does not stop the file from loading.