iAO - MQL4 Documentation

double iAO(

string symbol, int timeframe, int shift)

Calculates the Bill Williams' Awesome oscillator and returns its value.

Parameters:

symbol	-	Symbol the data of which should be used to calculate indicator. NULL means the current symbol.
timeframe	-	Timeframe. It can be any of Timeframe enumeration values. 0 means the current chart timeframe.
shift	-	Index of the value taken from the indicator buffer (shift relative to the current bar the given amount of periods ago).

Sample:

  double val=iAO(NULL, 0, 2);