XGD Gold stocks 45-day cycle

I stumbled on this using the Tradingview cycle pattern tool and it seems to be a valid cycle although I don't know how long this cycle of bottoms and tops will continue. The next one is set for Oct 8. The only problem is I can't figure out if the next cycle date will be a top or a bottom. I guessed on the last one and made a 8.5% profit using HGU (2x ETF for XDG) buying on the next trading day after the cycle date and selling the next morning when it hit the top of the channel I'd drawn. Maybe someone else can figure out how to know if the next cycle date will be the start of a downtrend or uptrend. I tried a number of indicators and Bollinger bands but couldn't spot reliable pattern that I'd actually trade my own money with.
goldtradingHGUTrend AnalysisXGD

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