Pairs Trading Strategy. Two instruments in one chart

We seek the development of a strategic chart indicator capable of visually concealing differentials between two financial instruments on a singular chart. Presently, we utilize a conventional approach whereby one instrument is opened and juxtaposed with another, resulting in the observation of two distinct lines. To enhance the efficacy of pairs trading, a hedge strategy entailing the purchase of one instrument and simultaneous sale of another correlated instrument, we endeavor to implement a more precise method wherein both instruments' disparities are represented as a singular line, candle chart, or similar graphical representation.