Ema on rsi in pi chart

is there restriction on no of ema on this pi software? because i get on some but not displayed on some other.please clarify.

you were putting ema on rsi, you can
the average must be showing ouside so click and drag to the column you want, then put again ema and drag to second column, try this, it will work

the problem is in some of rsi i get ema and can drag.
in some rsi ema line is not displayed. then what to do?
to be precise in 5 cases i get it. in 2 this problem is there.