Fundamentaly fueled by CBOE's XBT expiration. source: cfe.cboe.com/cfe-products/xbt-cboe-bitcoin-futures
Note
to learn more about btcmachine script/indicator: 
Trade closed manually
wrong by 1 day : (
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Disclaimer
The information and publications are not meant to be, and do not constitute, financial, investment, trading, or other types of advice or recommendations supplied or endorsed by TradingView. Read more in the Terms of Use.