The correction phase is over. It is confirmed by %R, reaching the bottom of the price range and converging support/resistance lines. It might be flat for a while, but the growth to the level of $800 or higher is almost certain. Not setting any targets, for the asset is quite promising and it implies going long.
You didn't used Williams Percent Range with other type of indicators (it's necessary). You also have to know that using %R you need to filter lot of signals. That's why I think this strategy could not work. You should also mix it with (for example) MA strategy.