QS-Create-a-chart-in-that-is-the-result-of-subtracting-two-other-charts

hi, someone can help me understand if there is a way in Qstudio to create chart that not in the market data (for example: create a chart that his values high, low, open.. they are the result of substracing two other charts) , and use that chart for entry\exit signals or anything else like regular chart.

thanks!