Timing Tab>Market Timing Graph>Performance Graph-Add Watchlists and Portfolios
Just to clarify and summarize other suggestions.
"Add items to graph" input box needs dropdowns for a list of all Watchlists and all Portfolios so that ALL stocks in a selected watchlist or portfolio are populated in the list below it. When populated in the list, they are also AUTOMATICALLY checked and populated into the graph itself. Indicate maximum number of layouts that can be saved, if applicable.