Thinking about reversal in a rally is not going to get anyone anywhere. You might nail 2 out of 20 trades that way. You are better served looking for continuation levels. Blindly selling or buying a level without context of the trend is a very bad way to trade support.There are 3 scenarios that typically play out.
1) price hits a level, spends a short period there before shooting through. Opportunities in this scenario come with a retest of the level just broken.
2) price breaks through a level without hesitating. If the trend is strong, the same opportunity exists as described in 1. If the trend is weak look at scenario 3
3) same profile as scenario 2 however the level fails to hold and price retreats below the level. This is the best and in my opinion the only safe way to trade a reversal. This scenario can also play out differently. It resembles scenario 1 but price behaviour at the level give subtle clues that the level is going to hold. This is also typically the area where you get a pullback for a continuation of the trend. I love this scenario because it's like a double payoff.