The WAMI-based trading lies in the application and iteration of the optimization process until the indicated trades on past market data give consistent, profitable results. It is rather difficult process based on Fourier analysis. You can to change Trigger parameter for to get best values of strategy.
You can change long to short in the Input Settings Please, use it only for learning or paper trading. Do not for real trading.
In true TradingView spirit, the author of this script has published it open-source, so traders can understand and verify it. Cheers to the author! You may use it for free, but reuse of this code in publication is governed by House rules. You can favorite it to use it on a chart.
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