Stoplosses12 Aug 2018 13:02
Be aware that even if you set a stop loss, if the share price is re tracing downwards quickly, and your stop loss is reached, the system does not automatically execute a sale at your set SL. It may sell much lower than you set. If the SP starts to rise again back above your SL again it may not sell but you will get an email explaining why.
Also I believe that the MMs have sight of your stoplosses so can manipulate a price at will.