Comparing Reliance chart with NIFTY CTB

I am using RSI on Reliance chart. There is an option to compare the Reliance chart with other scrips. If I compare the Reliance chart with NIFTY, for which scrip will I get backtest results after clicking on CTB? Or will I get backtest results for both of them after clicking on CTB?

I am attaching a sample screenshot -

@sasuke you will get the backtest results for Reliance after clicking on CTB in this case because you have plotted the NIFTY 50 chart in the Reliance chart.