Source for Historical Intra-Day?

I'd like to be able to test some theories….but to do that I need a good zoomed in Intra-Day image……but for historical intra-days…on a host of different stocks.

In other words, I want to be able to punch in a date in the past for a certain stock….and get a good zoomed in visual of it's Intra-Day movement and volume.

From what I’ve experienced, most services just provide historical graphing that isn’t intra-day specific. This makes it hard to decipher actual 1 to 5% intra-day pops based on real-time events.

Anyone know of a service that provides good historical intra-day graphing and volume?

Thanks for your consideration,
-m