All of the strongest trades have multiple elements of confluence, this trade idea is no different. There are 3 elements of confluence that speak most strongly here:
1) When sellers began to take the price lower on July 3, buyers stepped in at a much higher level on July 12 than they did on July 21, signalling their confidence in their ability to break into new highs.
2) The buying activity from July 12 - 14 is very strong, with very little selling presence, indicating strong control from the bulls.
3) The daily candlestick that closed on July 14 cleared the 1.30415 key level with some considerable distance. This is important because it indicated that the buyers most likely took out the sellers' stop-losses positioned just above this level. Once these stop-losses were cleared, they only added further buying momentum.