Since trading is a movie and not a slideshow, you want what's called "replay", i.e., you tell the program where to start and what interval you want (1m, 5m, whatever, though if you select something longer than a minute, you're going to spend a lot of time sitting and waiting, which are ripe conditions for over-trading). As to what's available now, I can't say. I haven't looked into this for quite some time. There's NinjaTrader, though you'll be setting yourself up for an endless stream of emails pitching this or that for only pennies a day. I suggest selecting the broker you're going to eventually work with, preferably one which offers replay (which ought to be just about everybody; it's no longer a sophisticated offering), set up an account, then simtrade the account (assuming the broker offers that; if he doesn't, look further).
You don't yet know that the uptrend has ended. Price could just as easily move sideways. Then you're stuck in a trade that isn't going anywhere (this is called "opportunity cost", i.e., your money isn't doing zip for you but you can't use it anywhere else because you're futzing around with this trade that's just twiddling its thumbs). It's fine that you're beginning to define "reversal", but you're going to have to run this by an awful lot of what appear to be setups before you know whether or not it's dependable.
As for an "aim", why? Why choke off a trade that shows no signs of ending? Unless you want to be a recreational trader?
