The GBPUSD has been riding the 50 sma for awhile. It is at a place to decide where to go. If it decides to go long then the Macd blue line is going to cross above the 0 line. If it decides to go short then the blue line will fall to the 20 level line of the Macd. If price continues sideways a bit then the blue line could fall, then cross back over the red and then cross below the red line again if it is going short.