I just saw an email in my mailbox from trade2win. Someone is preaching not to use stops.
Ok. Maybe he is trading only stocks or options so he could get away with stops. If an option trader is wrong, the worst loss for him might be just the premium unless the trader is writing naked call/put. Or he probably trades low beta blue chips stocks which might be a small portion of his total investment.
For commodity and currency traders, because the margin account is highly leveraged, it would be a question of "when', but not "if" he will be wiped out without stops for his position.
My thinking about stops is there are two types of stops are often used, technical stop and emergency stop.
Emergency stops are intended for unforeseeable events (black swan event), for instances, war, computer/internet access problem, personal accident/injury which would prevent trader from contacting his broker in any means. If a daytrader's broker has automatic liquidation program and a daytrader is using low margin for commodity trading, he might not need emergency stop since his account will be liquidated as soon as he is below low daily margin (usually 300-500 USD for each ES position). He has to arrange it with his broker to carry out liquiation of his account rather than issuing margin call. Hopefully, that would be the maximum loss that can occur to a day trader in worst scenario unless broker fails to manage his clients accounts.
Emergency stop can be extremely important for those who has overnight positions.
I use technical stop when I try to get better fill without enough confirmation so I can limit my loss if I am wrong. For instance, if I want to go long after selling climax, and I want to get in very close to the swing low. The reason is there most likely will be second test (double bottom scenario), the second test can be new swing low if the selling pressure is not completely released at first swing low.