SPECIMEN 008 / STRATEGY AUTOPSYCRYPTO · WALK-FORWARD · 2020–2026

The 9/21 EMA Crossover

The day-trader's bread and butter — fast EMA over slow, you're long. Unlike most of this graveyard, it actually held up.

Momentum Spot · daily · EMA(9/21) 10 coins · out-of-sample Survived

01 The seduction

Nine-period EMA crosses above the twenty-one, you go long; crosses below, you're out. It's the first crossover every day-trader learns — faster and twitchier than the golden cross — and on a trending chart it hugs the move closely.

The 9/21 EMA Crossover · BTC

+1143%

$1,000 → $12,434 vs $7,771 holding

Beat buy & hold

8 / 10

a real majority

Out-of-sample

7 / 10

held up in recent years

02 The one line that ends it

The 9/21 EMA Crossover vs. doing nothinglog scale

The strategyBuy & hold (doing nothing)

The 9/21 EMA Crossover beat holding on 8 of 10 majors — and 7 of 10 out-of-sample. Same money, same window, fees included — measured against simply buying Bitcoin once and never touching it.

03 The evidence

Coin	Trades	Win %	Strategy	Buy & hold	Verdict
BTC	46	41	+1143%	+677%	beat
ETH	46	37	+1534%	+1237%	beat
BNB	50	40	+7103%	+2762%	beat
SOL	44	32	+3080%	+2768%	beat
XRP	50	28	+137%	+365%	lost
LINK	53	28	+84%	+140%	lost
LTC	55	24	−32%	−36%	beat
DOGE	41	37	+6410%	+2139%	beat
ADA	49	20	+1186%	+173%	beat
AVAX	47	28	+2112%	+60%	beat

Long/flat spot, no leverage, next-bar fills, 0.06% fee per side. Beat holding on 8 of 10 coins — and on 7 of 10 in the recent out-of-sample period (the test that separates a real edge from a bull-market coincidence).

04 Verdict

One of only two here that survived the honest test — beat buy-and-hold across coins and stayed ahead out-of-sample. That's rare, and it's real. It is not a money printer: low win rate, heavy whipsaw, and past performance is still not the future. But it didn't fall apart the way the famous signals did.

Method — long/flat spot, next-bar execution (no look-ahead) · 0.06% fee both sides · each coin over its full Binance history from 2019 with indicator warm-up · benchmarked against buy-and-hold on the identical window · out-of-sample = the most recent ~45% of each coin's history. Reproducible.

The catch

Here's the honest catch, because a green badge on this site has to be earned carefully. The win rate is about 30% — you sit through long, ugly runs of small losses waiting for the few big trends that pay for everything. It's only tested long/flat on ten majors: no shorts, no small-caps, no live slippage. And “held up in the past” is never “works next cycle.” What it did do is beat holding on 8 of 10 coins and keep beating it in the recent out-of-sample years — not just the 2021 bull. That's the bar the golden cross failed. It cleared it, and no higher.

05 Your turn

Think yours is the exception?

Run your own strategy through this exact gauntlet — multi-year, out-of-sample, across bull and bear, fees included, benchmarked against doing nothing. You get the full report and the downloadable code.

$1.99per strategy
full report + code

Test my strategy → Coming soon

✓ The price is shown up front, right here. You will never build a test and then get hit with a paywall to see the result.