The nutshell is this: Bars refer to our measurement of how much volatility a stock has on average every 15 minutes. If a stock moves $1.00 on average every 15 minutes, it has a bar value of $1.00. This number is specific for every stock. For this reason it's not possible to say, a stop loss of $0.50 because that amount is relatively different for a low-priced stock vs. a high priced stock when looking at all the stocks that might be produced from a particular strategy.
If you ask for a stop loss of 2 bars, you are asking us to exit the position if the volatility is twice its average bar.
Having a video is a good suggestion - we are working on one now. Thanks again
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