What is the name of this line?

 
"MACD-Cross" EA place order upon Cross of 2 MA Lines.
while in additional windows it show a horizontal line which value of zero.
What is the name of the horizontal line?
Do we can create an EA base on MA lines above horizontal line then BUY or vice versa?

Any Example?

 
Level 0.00
 
FXEWEN:
"MACD-Cross" EA place order upon Cross of 2 MA Lines.
while in additional windows it show a horizontal line which value of zero.
What is the name of the horizontal line?
Do we can create an EA base on MA lines above horizontal line then BUY or vice versa?

Any Example?

It's called the X axis
 

It's zero axis.