Won't work really, you'll see many times that it just follows the bollie down down down, or up up up. Obviously if you have SLs it can work out so you don't lose too much.
Since it is a practice account, give it a go, let us know if it works.
A better strategy IMO would be to short a break of the 21:2 bolli bottom, or buy a break of the 21:2 top bolli. I do this often on the 1hr and 4 hr chart.
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