I've been trading off the 5 min tf for about 6 months. My risk factor is much lower than 100 pts. Perhaps my method is a bit unorthodox but, I do use some discretion by trailing my stop based on current price action. Most of the time a move against your position won't just spike you out but, will go on to close above/below the base of an arrow.
Another factor is that, although I'm looking for 100 pt trades, if the market has real momentum and continuously making new highs/lows, I will let the position run. I'll move my stop to lock in 100 pts. which still allows the trade the potential to move further. This stategy, regularly, yields more than 100pts.
In all honesty, screen time is an essential in getting to know this pair and it's idiosyncracies. I don't, always enter a trade based purely on FX53 signals, although 95% of my decision making is based on the system. I might enter a trade slightly earlier if I've got half a signal on FX53 and price action justifies me "jumping the gun".
It's a tough market to trade but, FX53 does a great job at getting it right much of the time.
Thanks a lot for your help, Alan ! good answers to my dumb questions, helps with building my confidence