These meltdowns have got to stop.. It appears you have some compulsive/obsessive behaviors to deal with. I would suggest (as always) that you set things up to be foolproof, so that it is more difficult to break the rules. If you can somehow force yourself to stop trading for a bit once a breaker has been hit, you will likely be able to fight off the urge to continue. The reason you continue loss after loss is because the next trade is right there in front of you, just a keystroke away. Some suggestions to stop trading:
1. Write a program that tracks your P/L somehow.. once the loss limit is reached and you are flat, it disables the trading program until the next morning. Maybe someone here could write something along those lines.
2. Put a big red button next to your keyboard or somewhere within easy reach. When you reach your loss limit, reach over in disgust and smack the button. dont think, just hit it. It will be a circuit breaker that cuts power to the DSL or cable modem. Connect the modem to a different circuit and have the button short that electrical circuit only, cutting out your connectivity to the broker.
A simple circuit breaker idea is connect the button so it shorts the outlet on the wall directly, kicking the circuit breaker and requiring you to go outside or to the breaker box to reset it.
You can come up with your own idea, but it should be something that is very very easy and quick to activate, and it should take a while to get things running again.
Once you hit the button, or close the program, or whatever, head straight out the door and dont look back. Have a set plan on where to go. Some favorites of mine include working out at the gym, or going to the courthouse and finding a good trial to watch.