@Capitalist_55 The backtest period primarily depends on the base timeframe selected and its lookback period. For example, if your base timeframe is 1 minute, you’ll be able to backtest up to 1 month of data. As the timeframe increases, the available backtest duration also increases accordingly.
That said, you can always change the date range to backtest your strategy over a specific period within the available lookback window.
To understand this better, you can refer to our help manual here:
Hope this clarified the doubt.