GBTC touched the 200-day Moving Average and (it appears) triggered buying if you had this set up - congrats! I didn't. :-( There is enough of a pattern now that I need to be more vigilant.
GBTC over-reacts to BTC price movement in each of these examples (red arrows) as GBTC crosses the 20-day MA, more downside to follow. When GBTC touches the 200-day MA, upside likely to follow.
As whatsthismean points out - this chart shows the 200-HOUR moving average (based on the chart increment).