This study does a division ("/") between the ticker to benchmark symbol. It works only on day timeframe.
Often referred to as spread charts or ratio charts this is often used to measure the strength and performance of a script vis-a-vis a benchmark index. In this study, the comparison is plotted from a fixed reference session. On the current bar, the percentage change of the current ratio to the reference ratio is displayed as a label down icon, rounded to nearest integer. There are options to plot either a candle plot or line plot. The reference date can also be changed from the input dialog.
In the example above, 13-Feb-2020 is chosen as the reference date. Ratios are plotted from this reference date onwards. At the latest bar, the "60%" displays the percentage difference between ratio on 13-Feb-2020 and current date, 09-Sep-2020. This means RELIANCE performed 60% better than the benchmark NIFTY50 since 13-Feb-2020.