yes if you do trading in a limit and then do not exceed that limit you can really play gambling in a safe ways. but you must stand firmly on your decision.
Playing in a limit can only limit the loss,yes its a good strategy and i recommend to always play in limit only but that to doesnt mean that you can make good return out of gambling,safety is never promised in gambling,yes if you are in limit then you will not be in much danger of loosing big.