(PECL trader >= 0.2.0) Rate of change : ((price/prevPrice)-1)*100 array trader_roc ( array $real [, integer $timePeriod ] ) Parameters: real Array of real values. timePeriod Number of period. Valid range from 2 to 100000. Returns: Returns an array with calculated data or false on failure.

(PECL trader >= 0.2.0) Percentage Price Oscillator array trader_ppo ( array $real [, integer $fastPeriod [, integer $slowPeriod [, integer $mAType ]]] ) Parameters: real Array of real values. fastPeriod Number of period for the fast MA. Valid range from 2 to 100000. slowPeriod Number of period for th

(PECL trader >= 0.2.0) Plus Directional Movement array trader_plus_dm ( array $high, array $low [, integer $timePeriod ] ) Parameters: high High price, array of real values. low Low price, array of real values. timePeriod Number of period. Valid range from 2 to 100000. Returns:

(PECL trader >= 0.2.0) Plus Directional Indicator array trader_plus_di ( array $high, array $low, array $close [, integer $timePeriod ] ) Parameters: high High price, array of real values. low Low price, array of real values. close Closing price, array of real values. timePerio

(PECL trader >= 0.2.0) On Balance Volume array trader_obv ( array $real, array $volume ) Parameters: real Array of real values. volume Volume traded, array of real values. Returns: Returns an array with calculated data or false on failure.

(PECL trader >= 0.2.0) Normalized Average True Range array trader_natr ( array $high, array $low, array $close [, integer $timePeriod ] ) Parameters: high High price, array of real values. low Low price, array of real values. close Closing price, array of real values. timePerio

(PECL trader >= 0.2.0) Vector Arithmetic Mult array trader_mult ( array $real0, array $real1 ) Calculates the vector dot product of real0 with real1 and returns the resulting vector. Parameters: real0 Array of real values. real1 Array of real values. Returns: Returns an array with calculated data or false on

(PECL trader >= 0.2.0) Momentum array trader_mom ( array $real [, integer $timePeriod ] ) Parameters: real Array of real values. timePeriod Number of period. Valid range from 2 to 100000. Returns: Returns an array with calculated data or false on failure.

(PECL trader >= 0.2.0) Minus Directional Movement array trader_minus_dm ( array $high, array $low [, integer $timePeriod ] ) Parameters: high High price, array of real values. low Low price, array of real values. timePeriod Number of period. Valid range from 2 to 100000. Returns:

(PECL trader >= 0.2.0) Minus Directional Indicator array trader_minus_di ( array $high, array $low, array $close [, integer $timePeriod ] ) Parameters: high High price, array of real values. low Low price, array of real values. close Closing price, array of real values. timePer