Ask Colin

Is there a role for intraday data in trading decisions?

It all depends on your time frame. If you are trading in and out during the day (a day trader), then you cannot do without it (and the cost of it and the brokerage will probably depress your profitability).

If you buy for several days or any longer time, you probably don't need intraday data very much, if at all. Although I am an investor, I sometimes use intraday data when I am finessing an entry or an exit. I have access to an intraday chart on my broker's (CMC) website because I pay for dynamic data. It does the job for me.