Am I missing something? Not getting any results.

require_once DIR.'/vendor/autoload.php';

// use LupeCode\phpTraderNative\Trader;
// $var = new Trader();
// ^ ?????

$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));