Quote from Scataphagos:
Stops are about preservation.
When you enter a long, you do so because "you believe the market will rise from your entry"... and your stop should be "the amount I'm willing to risk that my play is correct".
Where to place a stop is both a guess and an art. Suggest stops be placed at some chart point that makes sense to you.
Trading without stops is suicide in the making.
I assume you are refering to price stops. If so, this is a very narrow viewpoint. I understand that people develop these beliefs to limit pain, but they will also limit you as a trader. I have systems that I trade that do not use price stops.
I would encourage everyone here to be open minded about other methods of limiting risk, as someone else already mentioned. If you are new to trading and/or doing discretionary trading you may need stops to keep you sane, but if you are doing automated/systems trading there are many ways to limit risk in a system that MAY be better for that system than price stops.