Difficulty in initiating a backtest on a screener may indicate that certain parameters in the screener are unavailable or incompatible with the backtesting feature. If you attempt to run a backtest on a query containing these parameters, an error message will be displayed, identifying the incompatible parameters.

To resolve this issue, remove the indicated parameters from your screener. Doing so will enable backtesting, allowing you to analyze historical data effectively.

Here's the list of parameters that don't support backtesting: https://trendlyne.com/us/fundamentals/unavailable-fields-info/.