I can´t get my indicator to start drawing from N bars

 
Helllo; i have programmed an indicator but i cant get it to draw only from a number of bars it continues to draw from the maximum historic bars posible or from the next new bar, i know it must  be easy to do but i am stopped by this, thank you very much in advance and regards.
 
15930:
Helllo; i have programmed an indicator but i cant get it to draw only from a number of bars it continues to draw from the maximum historic bars posible or from the next new bar, i know it must  be easy to do but i am stopped by this, thank you very much in advance and regards.

You need to show your code. We can't rally guess what your problem is.
Reason: