(PECL trader >= 0.2.0)
trader_macd — Moving Average Convergence/Divergence
$real
   [, integer $fastPeriod
   [, integer $slowPeriod
   [, integer $signalPeriod
  ]]] )
real
    Array of real values.
fastPeriod
    Number of period for the fast MA. Valid range from 2 to 100000.
slowPeriod
    Number of period for the slow MA. Valid range from 2 to 100000.
signalPeriod
    Smoothing for the signal line (nb of period). Valid range from 1 to 100000.
Returns an array with calculated data or false on failure.