The software is 100% safe. Any software that you buy need to be installed. Mental Stop only connects with IB TWS. It does not connect to the internet by itself. Here's a YouTube video demo of it.
/watch?v=cnyJVWegSAY&fmt=18
grantx, to answer your question, it is possible via custom...
Just use this for stop orders instead of resting the stop with the broker or exchange.
You can also bracket around the current price to catch breakouts.
Mental Stop