The stop limits are determined via Billy and Pascal work. The work involves use of ATR, volatility, pivot weighting, etc., I believe? The exact formula for the IWM robot stop limits is proprietary.

The MF signal comes from the 20DMF that Pascal calculates and periodically updates throughout the day. At the top of the main webpage you should see a link for it. If you click on it and scroll down, you will see a zoomed version that Pascal sometimes updates during the trading day if he's available. At the bottom are the rules for the 20DMF. So, for example, if the IWM robot is long and yet the 20DMF issues a sell signal, the Robot will exit it's position. When we are getting close to such a situation, Pascal or Billy will post a heads up message in the forum

Harry