Learning Trade Forex

I caught nice little trade in slow and thin market. Sudden push down of 40 pips in 4 minutes, there was no bounce back up so I figured there may be some more downside. Based on 5min chart if last lows were going to be broken around 80 next support are previous highs at 70. It played exactly like that. Push back after my exit is reason why I like to grab profits when I have them and not use trailing stop or anything. I hope that I would exit this at -10 half size pips stop as I initially planned if that occurred.
+ 10 full size pips