trader_bbands

<?php
// According to Wikipedia and the internet:
// Bollinger Bands chart the price and volatility of a financial instrument over time 
// and yield an "envelope" minimum and maximum and middle "bands" of moving averages
// which provide a relative definition of high and low market prices
// Prices are "high" at or near the upper band and "low" at or near the lower band. 
// Bollinger Bands are considered useful for pattern recognition
$closes = array(112.82, 117.32, 113.49, 112, 115.355, 115.54, 112.13, 110.34, 106.84, 110.08, 111.81, 107.12, 108.22, 112.28);
$time_period = 5;
$upper_deviation_multiplier = 2.0;
$lower_deviation_multiplier = 2.0;
$ma_type = TRADER_MA_TYPE_SMA; // Simple Moving Average
 //TRADER_MA_TYPE_EMA - Exponential Moving Average
 //TRADER_MA_TYPE_WMA - Weighted Moving Average
 //TRADER_MA_TYPE_DEMA - Double Exponential Moving Average 
 //TRADER_MA_TYPE_TEMA - Triple Exponential Moving Average 
 //TRADER_MA_TYPE_TRIMA - Triangular Moving Average
 //TRADER_MA_TYPE_KAMA - Kaufman's Adaptive Moving Average
 //TRADER_MA_TYPE_MAMA - MESA Adaptive Moving Average
 //TRADER_MA_TYPE_T3) - T3 Moving Average
 
var_dump(trader_bbands($closes, $time_period, $upper_deviation_multiplier, $lower_deviation_multiplier, $ma_type));
// Index 0 is "upper" band.
// Index 1 is "middle" band.
// Index 2 is "lower" band.
/*
array(3) {
 [0]=>
 array(10) {
 [4]=>
 float(118.025)
 [5]=>
 float(118.401)
 [6]=>
 float(116.739)
 [7]=>
 float(117.153)
 [8]=>
 float(118.563)
 [9]=>
 float(116.676)
 [10]=>
 float(113.996)
 [11]=>
 float(113.114)
 [12]=>
 float(112.577)
 [13]=>
 float(113.892)
 }
 [1]=>
 array(10) {
 [4]=>
 float(114.197)
 [5]=>
 float(114.741)
 [6]=>
 float(113.703)
 [7]=>
 float(113.073)
 [8]=>
 float(112.041)
 [9]=>
 float(110.986)
 [10]=>
 float(110.24)
 [11]=>
 float(109.238)
 [12]=>
 float(108.814)
 [13]=>
 float(109.902)
 }
 [2]=>
 array(10) {
 [4]=>
 float(110.369)
 [5]=>
 float(111.081)
 [6]=>
 float(110.667)
 [7]=>
 float(108.993)
 [8]=>
 float(105.519)
 [9]=>
 float(105.296)
 [10]=>
 float(106.484)
 [11]=>
 float(105.362)
 [12]=>
 float(105.051)
 [13]=>
 float(105.912)
 }
}
*/