This indicator is engineered to make relational analysis much easier.
If you used another window for each symbol, you would have to resize them all one by one. You don't need another timescale.
There are three modes:
► Independent - selected symbol candles are colored on their own.
► Correlational - selected symbol candles are colored depending on their relation to the chart symbol. If it is correlational, 1st color is chosen (both have Close higher than Open). 2nd color will be used for the opposite.
► Anti-Correlational - the opposite of Correlational
To display my indicator, I chose USDCAD and Oil. Canada has the second-largest oil reserves in the world and naturally, they are their neighbor's supplier. If the oil price goes up, USDCAD should be tanking, unless a different major influence(s) happen to be stronger at a time.
Good luck!