Pi Cycle Top Indicator chart: the 111-day moving average against twice the 350-day moving average. Their crossover has marked every major Bitcoin cycle top within days. Updated daily.
▲ marks every day the 111-day SMA crossed above 2× the 350-day SMA. Log scale.
| Date | BTC close |
|---|---|
| Apr 25, 2011 | $2 |
| Apr 7, 2013 | $153 |
| Dec 5, 2013 | $1,045 |
| Dec 16, 2017 | $19,497 |
| Apr 13, 2021 | $63,420 |
As of Oct 19, 2026 the 111-day moving average is $73,254 and twice the 350-day moving average is $153,450 — a ratio of 0.48×. The fast line is -52.3% from the cross, so the Bitcoin Pi Cycle Top Indicator has not fired.
The BTC Pi Cycle Top Indicator is a timing tool rather than a valuation gauge: it says nothing until the fast average overtakes the slow one, and every cross so far has landed within days of a cycle high.
signal = SMA(111) crosses above 2 × SMA(350)
Two simple moving averages of the daily close: a fast 111-day line and a slow 350-day line multiplied by two. The ratio 111 / 350 ≈ 0.318, close to π / 10, which gave the indicator its name. The chart shows both lines with price; a marker is placed on every day the fast line crossed above the slow one.
Coinfuty computes both averages from its own daily close series, so the cross dates may differ from other sites by a day where their price source differs.
The crossover fired within three days of the 2013, 2017 and April 2021 tops. It is one of the few indicators that timed tops rather than just valuation extremes, but it fires late in a blow-off: by the time it crosses, the move is usually days from ending.
Not currently. As of Oct 19, 2026 the 111-day SMA sits at 0.48× of twice the 350-day SMA; the signal fires when that ratio reaches 1.00×.
The most recent cross was on Apr 13, 2021. All crosses in the series: 2011-04, 2013-04, 2013-12, 2017-12, 2021-04.
The creator tested many pairs and found that 111 and 2×350 crossed within days of every major top; 350 / 111 ≈ 3.15 ≈ π, hence the name. There is no economic reason behind the numbers.
Historically the cross has marked tops with remarkable timing, but with only four instances and a curve-fitted definition it should be one input among several, not a standalone trigger.
Coinfuty computes every series on this page from daily BTC close prices and public constants — the Bitcoin halving schedule, block subsidy and published regression coefficients. Values refresh nightly (00:20 UTC) and the current day is patched hourly. These are historical, backward-looking indicators; nothing here is investment advice.