I want to plot EMA with RSI parameters

AFL Programming
5

If you want to have possibility of using different array other than Close then you have to use RSIa() function

src=(Close);
length = Param("RSI Length",14,1,100,1);
SSF=Param( "SF RSI SMoothing Factor",5,1,50,1);
RSII=EMA(RSIa(src,length),SSF);

As written in manual here
https://www.amibroker.com/guide/afl/rsi.html

Second version RSIa accepts input array so it RSI can be applied to other arrays than close.

BTW, please use code tags when inserting codes to your post.
It is mandatory rule.