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The Pi Cycle Top Indicator is one of the most precise tools ever developed for identifying Bitcoin market cycle peaks. Over three major bull markets — 2013, 2017, and 2021 — it identified the exact top within days. Understanding how it works, and what it's telling you now, could be the difference between riding a cycle to its peak and holding through a devastating 80% correction.

What Is the Pi Cycle Top Indicator?

The Pi Cycle Top Indicator uses two moving averages and their relationship to signal when Bitcoin may be approaching a major market top:

• 111DMA — the 111-day simple moving average of Bitcoin's closing price. A medium-term trend indicator.
• 350DMA × 2 — twice the 350-day simple moving average. The long-term trend, amplified by a factor of two.

The signal: when the 111DMA crosses above or closely approaches the 350DMA × 2, a major market top is historically near.

The indicator was discovered by analyst Philip Swift, who noticed that the ratio of 350 to 111 is approximately 3.153 — remarkably close to pi (π ≈ 3.14159). This mathematical near-coincidence gave the indicator its name. More importantly, these specific moving averages turned out to have extraordinary predictive power for Bitcoin's most significant price peaks.

Why These Specific Numbers?

Under normal market conditions, the short-term 111DMA trades comfortably below the amplified long-term 350DMA × 2. Bitcoin's price needs to rise far and fast — a true speculative blow-off — for the 111DMA to accelerate enough to close that gap.

When it does, the message is clear: the market has moved too far from its long-term baseline. The excesses of speculation have outrun fundamental value. Mean reversion is overdue.

The 350-day window captures roughly one full "half-cycle" of Bitcoin's four-year halving cycle. The 111-day window (roughly one-third of a year) captures the near-term trend. Their relationship naturally reflects where we are in the cycle.

Historical Performance: Three for Three

2013 Bull Market

Bitcoin's first major retail bull run topped in December 2013 near $1,150. The Pi Cycle Top indicator fired within days of the exact high — a remarkable result for a then-novel indicator tracking an asset most of the world had never heard of.

2017 Bull Market

The most famous Bitcoin cycle peaked on December 17, 2017, near $20,000. The Pi Cycle Top crossover occurred on December 17, 2017 — the same day as the all-time high at the time. This near-perfect timing drew widespread attention among on-chain analysts and cemented the indicator's reputation.

2021 Bull Market

Bitcoin's April 2021 top near $64,863 was flagged just two days in advance. The Pi Cycle Top fired on April 12, 2021. Over the following months, Bitcoin fell more than 50% before recovering briefly, then declining further into 2022.

Three complete bull cycles. Three accurate top calls. No other single indicator has matched this consistency for identifying Bitcoin's major peaks.

Understanding Pi Cycle Proximity

Rather than waiting for the binary crossover event, NakamotoNotes tracks the proximity of the 111DMA to the 350DMA × 2 as a continuous score. This gives you an ongoing sense of where we stand in the cycle — not just a one-time warning when the lines cross.

Proximity Range	What It Means	Historical Signal
0–25%	Far below top — early or mid cycle	Strong buy zone
25–50%	Mid-cycle progression	Neutral; hold bias
50–80%	Late cycle — gap closing	Elevated risk; reduce position
80–100%	Danger zone — top imminent	High-alert; prepare to exit
100%+	Crossover — historical top signal	Historically: major bear market begins

What Happens After the Pi Cycle Top Fires?

The historical record after a Pi Cycle Top crossover is sobering:

• 2013 top (~$1,150): Bitcoin fell ~87% to a low near $150 over 14 months.
• 2017 top (~$20,000): Bitcoin fell ~84% to ~$3,150 over 12 months.
• 2021 top (~$64,863): Bitcoin fell ~77% to ~$15,500 over 18 months.

The pattern is consistent: a Pi Cycle Top crossover historically precedes a 75–87% drawdown. These are not minor corrections. They are full cycle resets that take 1–2 years to play out.

This is why the indicator matters. Not as a curiosity, but as a risk management tool.

Limitations to Understand

The Pi Cycle Top is powerful but not infallible:

• Small sample size. Three accurate calls is impressive — but it's still only three data points. A four-cycle failure is possible, especially as Bitcoin matures and cycles dampen in amplitude.
• Lagging by nature. All moving average indicators are backward-looking. By the time the crossover occurs, some decline may have already begun.
• No entry signal. The Pi Cycle Top identifies tops, not bottoms. After a bear market, use other indicators (Mayer Multiple, MVRV Z-Score, NUPL) to identify re-entry zones.
• Bitcoin-specific. The 111/350 ratio reflects Bitcoin's specific four-year halving cycle. It doesn't apply reliably to other assets.
• Diminishing amplitude risk. As institutional adoption grows and Bitcoin matures, the blow-off tops may become less extreme — potentially making the crossover harder to achieve and the subsequent declines less severe.

Using Pi Cycle Top with Other Indicators

The strongest risk signals come from indicator convergence — when multiple tools point to the same conclusion simultaneously.

High-confidence "major top" evidence:

• Pi Cycle Proximity approaching 80–100%
• Mayer Multiple above 2.4
• MVRV Z-Score in red zone (above 7)
• NUPL in "euphoria" territory (above 0.75)
• Puell Multiple above 4

When all five indicators flash simultaneously — as they did near the 2017 and 2021 peaks — the evidence for an imminent top is compelling. NakamotoNotes synthesizes these signals into a single Bitcoin Barometer score, so you see the full picture at a glance.

How to Track the Pi Cycle Top

The NakamotoNotes app monitors the Pi Cycle Proximity score in real time. You'll see the current reading alongside other major indicators — and receive alerts when the score enters dangerous territory.

Download NakamotoNotes on the App Store or Google Play.

Frequently Asked Questions

Has the Pi Cycle Top ever given a false signal?

In three tested bull markets (2013, 2017, 2021), the indicator has not produced a false positive — the crossover has always been followed by a major bear market. However, the sample size is small, and future cycles could differ as Bitcoin matures.

What is the Pi Cycle Bottom?

The Pi Cycle Bottom is a related indicator — also using specific moving averages — designed to identify bear market lows rather than tops. It works differently and is not simply the inverse of the top indicator.

Where is the Pi Cycle Proximity reading right now?

The current reading is updated live in the NakamotoNotes app. Check the app for the most current Pi Cycle Proximity score.

Should I sell all my Bitcoin when the Pi Cycle Top fires?

That's a personal decision based on your risk tolerance and investment goals. The Pi Cycle Top is a risk management signal, not a mandatory sell trigger. Many long-term Bitcoin holders choose to hold through all cycles. The indicator is most useful for those who want data-driven guidance on when to reduce exposure rather than speculate on timing.

Conclusion

The Pi Cycle Top Indicator has earned its reputation as one of Bitcoin's most reliable top-calling tools. Its three-for-three historical accuracy — including an exact hit on December 17, 2017 — makes it impossible to ignore for any serious Bitcoin investor.

Used as part of a multi-indicator approach alongside the Mayer Multiple, MVRV Z-Score, NUPL, and Puell Multiple, the Pi Cycle Top gives you the most complete picture available of where Bitcoin stands in its four-year cycle.

The goal isn't to trade perfectly. It's to replace emotional decision-making with data — so you buy with confidence during fear, and reduce risk intelligently during euphoria.

Track the Pi Cycle Top and all major Bitcoin indicators in one place with NakamotoNotes.