The K-line on jie-ni's official website is like carving a boat to find a sword. On April 11, it predicted a 100% probability of $BTC rising in the future, with an average return of 5.82%. On April 21, it predicted an 80% probability of $BTC rising in the future, with an average return of 2.59%. Just checked again, and today's prediction shows a 60% probability of rising in the future, with an average return of 1.57%. Not gonna lie, it's pretty interesting. The probability of rising and the returns are indeed gradually decreasing. Free queries forever, link in the comments.