Willy Woo Fisher Transform Prints Only the Fourth Bullish Cross in Bitcoin History and the Last Three Called Bear-Market Bottoms

A classic trend indicator has produced a monthly bullish crossover for only the fourth time in Bitcoin’s history, and the analyst who flagged it says the previous three all marked bear-market bottoms without a single fake-out.

Willy Woo, the onchain analyst known for long-term Bitcoin cycle work, laid out the case in an X thread on Sept. 18 built around the Fisher Transform, a price trend analysis tool created in 2002. The indicator smooths an asset’s price action into a readable trend-strength chart by applying a log-based transform that corrects for the tendency of market prices to spend more time near extreme values than ordinary statistical data. It is formed of two lines, the Fisher line and a trigger line derived from it and plotted with a one-period delay, fluctuating on a scale centered on zero.

Three for three on prior bottoms

For Bitcoin, a sharp upward reversal in which the Fisher lines cross on monthly time frames has corresponded to bear-market bottoms. The latest cross, which occurred during July at a reading of -2.26, is the fourth on record.

“BTC bottoms: 3 for 3 without fake out. Latest cross is the 4th on record,” Woo commented. The best known of the prior signals came in late 2022, when the Fisher Transform hit -3.83 before Bitcoin bottomed and began the recovery that ran to all-time highs.

If history repeats, the cross implies BTC is at the start of a new macro uptrend. Bitcoin traded near 80,382 USD at the time of writing, according to CoinGecko data, roughly 40 percent above the 21-month lows near 57,000 USD printed on July 1.

Woo’s own caveat is important. Price could still consolidate or press lower. During bull markets, he notes, Fisher bearish crossovers have produced choppy fake-outs because speculative traders, who are sensitive to short-term price moves, dominate momentum. Bottom phases are different: those traders are mostly absent, so buy-pressure at value zones reverses price more cleanly.

“When price falls to a point where investors find value, buy-pressure fires back up but we are devoid of speculators,” he wrote. “Price reverses more cleanly without the choppy fake outs seen in tops. Hence bottoms are easier to define.”

The weekly divergence that echoes 2022

The monthly cross is reinforced by a second structure on the weekly chart. The Fisher Transform hit its swing low of -2.85 at the end of December last year, with Bitcoin still trading around 90,000 USD. Since then, the indicator has printed a succession of higher lows while price has made lower lows, a textbook bullish divergence.

The same pattern appeared in 2022, when a weekly Fisher divergence accompanied the final six months of that bear market before the cycle turned. Divergences of this kind signal weakening downside momentum even as prices fall, and their resolution often precedes trend changes.

Skeptics still outnumber converts

Not everyone is convinced the bottom is in. Despite a string of onchain reversal signals in recent months, doubts persist over whether the July 1 lows truly marked the cycle floor. Woo himself noted last week that buyer interest at those lows was unusually thin, with bid-side activity suggesting only a handful of large-volume investors were accumulating at the time.

Other analysts have staked out competing views. James Check of Glassnode has argued the cycle bottom may already be in near 58,000 USD based on price-pain and time-pain capitulation metrics, while desk analysts point to macro headwinds, including the Federal Reserve’s first rate hike in three years and the CLARITY Act’s failure in the Senate, as reasons the recovery could stall.

The technical backdrop has nonetheless improved markedly. Bitcoin has reclaimed its True Market Mean near 76,660 USD, forced more than 250 million USD in short liquidations during the recent squeeze above 81,000 USD, and sits above a 4-hour Supertrend support near 78,677 USD. A sustained break above 83,000 USD, a level several analysts have flagged as the confirmation trigger, would align price action with what the Fisher Transform already suggests on longer time frames.

Why the Fisher matters less than the structure

For all its clean record, a single indicator has never decided a Bitcoin cycle, and Woo’s framing is closer to probability than prophecy: bottoms produce cleaner signals because of who is left trading them, not because any formula is infallible.

The deeper signal in the thread is compositional. If speculators have largely exited and holder cohorts are absorbing supply at these levels, the marginal seller gets exhausted, and reversals stop needing a catalyst. That is the mechanism the Fisher cross is measuring, and it is the same mechanism that preceded every prior macro turn.

Fourth-ever signal, three prior bottoms, price 40 percent off the lows and rising: bulls have had worse setups. The test now is whether the monthly cross survives contact with a macro environment that has punished optimism all year. October, historically Bitcoin’s strongest month, arrives in eleven days.