I am trying to create a Zero-Lagging Moving Average indicator on similar lines in Powerlanguage.Net Editor.

///
EightSMA:= Mov((O+H+L+C)/4,8,S);
ZeroLag8SMA:= EightSMA + (EightSMA - Mov(EightSMA,8,S));
///

Can anybody help me with the programming in .Net?