Sudden Market Moves

I was able to trade 12 races yesterday. Things started well until Samarinda in the 16:20 at Kempton. I had been watching the market for a while and struck when I thought things looked right to catch a tick or two with a bet of $80 @ 7.6, but almost immediately the WOM (Weight of Money) inverted and the market shot up. I bailed out at 8.6, so was looking at a $9.30 loss. The momentum switched around just as quickly and still within that first minute I opened another trade with a bet of $80 @ 8.2 and was able to lay it back at 7.8 (only a 1 tick loss from the entry point of my initial bet!). That reduced the damage and I closed out the race -$6.15. I got almost all of that back in the next race and things continued along quite nicely until disaster in the form of Safin in the 18:00 at Towcester! I opened with a bet of $80 at 4.7, and a lay at 4.6 or 4.5 was looking likely when in a flash everything was swept up and the market gapped up by about 6 ticks. I tried to be patient and saw a gradual slide back to 4.8 which I was going to close out at when the same damned thing happened again...BOOM! The market gapped again and kept moving swifly up forcing me out with another big loss (-$12.86). I should have got up and taken a break at that point, or maybe stopped altogether, but I didn't and lost on the next race (-$8.61) and the next one after that too (-$2.92). I tried to refocus for one final race, making a mental adjustment to hang back just ever so slightly, proceeding a bit more cautiously. Not sure if that made any difference, but I managed to claw back $7.38.

It stands to reason that if I'm making an average of between 1 and 3 ticks on winning trades, losing trades that suck back 10 ticks are going to have a major negative impact. I need to look into the options offered by BetTrader Pro and Bet Angel Pro in terms of stop losses, as I know a stop loss would have saved me at least a few ticks on both occasions when the market gapped up significantly in the blink of an eye.