Modifying Existing Backtests

You can always edit a backtest to analyze the results of different variables. Learn how to modify an existing backtest's inputs and parameters.

There are two different ways you can modify an existing backtest. 

Inside of every backtest is an “Edit” button. 

Screenshot highlighting the location of the backtest edit button

You can select the button to access the inputs and edit the data. You can then re-run the backtest with the new values to see the different results.

Screenshot highlighting the edit backtest input display

Editing only the capital allocation demonstrates how the strategy will perform with different amounts of capital while keeping the strategy the same. The backtest can perform this function very quickly because none of the strategy’s details have changed.

You can also modify the backtest and use different inputs for the trade. You can change the strategy type, the components within the strategy, and/or the entry and exit conditions. This will take longer than changing only the capital allocation because the backtester must compile all new historical data.

NOTE: Modifying an existing backtest replaces that version. If you want to preserve the original results, simply create a new backtest.

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How do I edit an existing backtest and re-run it?

Select the "Edit" button at the top right,  make your preferred edits, and click "Run Backtest."

How long does a modified backtest take to run?

When modifying a backtest, changes to the capital allocation will complete very quickly because the data is already pulled from the original backtest. When modifying the strategy type or entry/exit criteria, it will re-run a completely new backtest and likely take a few minutes to complete.

When would I run a new backtest vs. modifying an existing backtest?

If you change the symbol or make other major changes to the strategy selection it is recommended you run a new backtest so your results are kept separate.