Does anyone know of a data service that allows you to overlay the S&P 500 with a stock... BUT also allows you to increase or magnify the scale of the S&P 500 so that the movements can be seen more clearly when it is overlayed over a volatile stock...
try yahoo beta charts. You can scroll in on any time period, and it will reference both to a zero percent origin.
i use yahoo beta but it doesn't allow you to individually adjust the scale of the 2 things you are comparing.... i basically want to blow up the movements in the S&P 500 so i can see them more clearly in relation to the stock....
Worst come to worst and if this will be part of your trade methodology... Go to the store and purchase lots of "overlay paper" (see thru) and print out your charts for overlaying on top of each other. Mark