<?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) }}*/