iAC - MQL4 Documentation

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double iAC(

string symbol, int timeframe, int shift)

Calculates the Bill Williams' Accelerator/Decelerator oscillator.

Parameters:

symbol	-	Symbol name of the security on the data of which the indicator will be calculated. 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 result=iAC(NULL, 0, 1);