What Is the Pi Cycle Top Indicator?
The Pi Cycle Top is a famous technical indicator that has historically pinpointed Bitcoin's cycle tops within a few days. It uses two long-term moving averages, and when the faster one crosses above the slower one, it has flagged major market peaks in 2013, 2017, and 2021.
How Does It Work?
The indicator plots:
- The 111-day moving average of price.
- 2× the 350-day moving average of price.
When the 111-day MA rises to meet or cross above the doubled 350-day MA, the market has historically been at or very near a cycle top. The "Pi" name comes from 350 ÷ 111 ≈ 3.153, close to π.
Why It Has Worked
The crossover captures moments when short-term price momentum has accelerated far beyond the long-term trend — the classic signature of a blow-off top. It's a top-detection tool, complementing the bottom-focused metrics like MVRV and NUPL.
Limitations
It only signals tops, not bottoms, and a model that worked across three cycles may not repeat perfectly as the market matures and cycles potentially lengthen or flatten. Use it as one signal among many, alongside the Fear & Greed Index, the Rainbow Chart, and the live Bear Market Clock.