indicator that shows distance between 2 ema's increasing/decreasing?

hey guys is there an indicator that would be able to tell me what the difference in space between 2 ema's is? lets say the 20 vs the 40 and I want to see when the space is getting larger/smaller etc. Thanks in advance!

MACD is the answer

Isn't that what CCI does?

so how would I set up macd to do this then?

fast ema would be the 20

slow ema would be the 40

what would the macd sma be?

fast = 20, slow = 40, sma = 1.