Poloniex api продать/купить сразу

как покупать или продавать сразу с помощью poloniex api. я использую nickelbot, и он всегда приводится в порядок

function api_buy()
{
    global $Adapters;

    $exchange = isset( $_GET['exchange'] ) ? $_GET['exchange'] : "error";
    if( $exchange == "error" ) return array( "error" => "exchange required" );
    $price = isset( $_GET['price'] ) ? $_GET['price'] : "error";
    if( $price == "error" ) return array( "error" => "price required" );
    $amount = isset( $_GET['amount'] ) ? $_GET['amount'] : "error";
    if( $amount == "error" ) return array( "error" => "amount required" );
    $market = isset( $_GET['market'] ) ? $_GET['market'] : "error";
    if( $market == "error" ) return array( "error" => "market required" );

    //let's not open up the trade api to the public:


    return array( get_class( $Adapters[$exchange] ) => $Adapters[$exchange]->buy( $market, $amount, $price ) );
}