statistically which is the the higher probability option

Hi, I was curious if anyone knows what is the higher probability trade is if a breakout of price occurs on a particular security, say break of a trend line. Is it to trade the breakout or wait for a pull back? I know it would also heavily depend on what it is you are trading and the system you are using, Risk/Reward; also something’s are less likely to have a pull back than others straight after a breakout.
Secondly do set-ups statistically have a higher probability to work on higher time frames? For example would a break of a trend line on a one-hour chart be more valid than on a 15min Chart? Does anyone know of percentage examples or where I may be able to obtain information on it?

Thanks

Typically i've heard, add a small position into the trend line before it hits, add more if it breaks, add on a pullback til 100% size.