I have heard that if one places a stop loss via a trade trigger / conditional order as opposed to via a conventional stop loss order, market makers will not be able to see at what price one should get stopped out at - because the conditions / triggers are not visible to them.

Can anyone confirm if this is correct?

If correct, it may be beneficial for Robot users to place their stop loss via a trade trigger / conditional order as opposed to via a conventional stop loss order - if not doing so already - just in case of the possibility of market makers seeing a pile of stops from Robot users on their screens at the same price level that they might then try to ambush.

More on conditional orders (some brokers call them trade triggers) can be found here (for IB clients, at least):
http://www.interactivebrokers.com/en...?ib_entity=llc