I used to be a long term trader using the 4h charts and such, however sometimes the retracements could be 50-80+ pips. I just think it wiser to take profits when you have them and wait to enter the trades near the ends of retracements (of course nobody knows the EXCACT end of a retracement).
My favourite time period for Simple 7 is 15m, I can and have used 1h. 15m works great because you can see directional changes in the market alot faster than 1h, 1d charts (less lost to retracements or even market reversals). Less than 15m can be misleading about the actual trend of the market and very often does not lead to 10-20 pips ema crosses.
I believe the Simple 7 strategy is great for entering trades. As for exiting you have to use your own trading abilities. If you look in the last week of my trades posted, one of the trades was for about 46 pips, that was one where I manually moved the SL a few times and then set a trailing stop loss for the close.
I can tell you the simple 7 strategy has a very high rate of success leading you into a profitable trade, if you are able to exit in profit is up to you. During my time as a trader I have learned many ways to manage trades and use several methods depending on the circumstances to manage trades. When I am not able to watch the trade, I set for example 10-20 pips TP and 10-20 pips SL and go to work for the day.
I hope this helps, many pips to you traders, be blessed!