What you risk per trade is what you are personally comfortable with and what delivers you the results you want based on your own performance.
If you are new then keep your risk low until you are confident about your trades and can increase your risk.
The best option is to find a small move which compliments that bigger move.
I took a GBP/CAD trade - which I'm still in by the way (but may exit my second position depending on what happens) originally based on the PB on the daily around the 15500 level.
If I used this PB then...Ignored
Fx_heaven, When I started I also did zoom to lower TF to choose the stop level which would allow me for smaller stops. But then here on this thread I read some suggestions to stay with one TF.
It is clear that the best stop level is behind the wick of PB - but yes it would be too big in many cases. Waiting until I have a PB that is small enough is not right neither (the bigger the better).
So, I guess if I want to manage my trades on the same timeframe I pick a setup, I have to fing a smaller pip value broker or increase my accoutn size...