private static function stream_setup($callback, $streamUrl)
{
//Set the internal callback function
self::$callback = $callback;
//Authenticate the socket to Oanda
self::authenticate($streamHandle = curl_init());
//Setup the stream
curl_setopt($streamHandle, CURLOPT_URL, $streamUrl);
//Our callback, called for every new data packet
curl_setopt($streamHandle, CURLOPT_WRITEFUNCTION, 'self::stream_callback');
return $streamHandle;
}
