There is a Bitcoin strategy that claims to find BTC tops and bottoms using a 13-count.
BTC Bottom - A bottom is found when BTC closes down 13 times. A count is made when it closes lower than the close 2 days before. When the count reaches 13, it's a bottom.
BTC Top - A top is found when BTC closes up 13 times. A count is made when it closes higher than the close 2 days before. When the count reaches 13, it's a top.
The guy who claims this strategy showed a chart marking 13-count tops and 13-count bottoms. His article appeared on MarketWatch a few days ago.