Yes It is useful feature in that perspective. Gecko software has also a dedicated tool for that and I'm also building such a tool but specific to my trading system.
Quote from Stardust:
Ensign Software has a very interestng feature called Playback. Price data can be played back, tick by tick in any time frame and set to any speed up to 10 times normal speed. By rapidly playing back data at high speeds the sub-concious can be "programmed" to intuitvely identify price patterns and trader set-ups. It a very effective practice tool, imo.
