I think trading with gambling is 2 different activities, because trading certainly requires the ability and skills in the implementation and in need of accuracy in analyzing market prices, while gambling can be done even without the ability and adequate skills and sometimes hope will be a lucky only.though both are equally risking money to make a profit, but trading has an object in trading while gambling only has money in the bet is not in the trade.
i think if it all involve risk then maybe it can be called a gambling in different way because in trading there ia no always assurance that you can get exactly what you aim. there is what so called an unpredictable result so that situation alone you already gamble.