Those are key levels for EURUSD daytrade and swing positions,
If the price will break out the resistance above it indicates the price tends To reach the supply above, it can provide an opportunity for daytrade buy Position with the supply above as a target, this supply is also a great continuation Level of sell position at the long-term, i'll sell at this supply and my target will be 1.1970.
The5%ers Blog: https://www.the5ers.com/blog/530-key-levels-eurusd-27-04-18