Thanks for the suggestion. But does OnDemand have historical data going back 5-10 years? I'm looking for a market replay/trade simulator with tick level data going back 5 to 10 years. Web based is even better but not required. http://www.tradingsimulator.net/ looks good but I think the site/product is dead? no link to try it out..
MotiveWave has Replay Mode that can show down to the tick or second. As far as historical data, it really depends on the broker or data service provider you connect to. I don't think you'll find anybody with 5-10 years of historical tick data as a direct connection. I believe IQFeed has the most, provided you download it after hours. You should also be able to find or purchase data files to import that contain more historical data to augment or backfill the connection you're using.
Their simulator used to be called RapidSP. It was not very good. With their new website design I can't tell what, if anything, has changed. When I used them they stopped providing data around 2017.