Study 01 · MisterLabs220

It worked on four coins.
Then it stopped on all four.

A multi-timeframe trend strategy — a slow 220-period trend filter with daily, 4-hour and 1-hour confirmation — tested unchanged on ADA, SOL, BTC and ETH from 2024-10-01 to 2026-08-04. It is profitable on all four in the first sixteen months and loses on all four in the six months after. This page shows both halves and every trade.

Not live

This is a backtest. No capital is deployed, no signals are sold, and none of this is financial advice or a recommendation to trade. Simulated results exclude slippage and funding costs, and they do not predict future performance.

What we found

The strategy is not broken. It is out of season.

Tested on its original asset alone, this looked like one of the best things we had built — a 1.83 profit factor across sixteen months on ADA. The obvious next step was to make it live.

Instead we ran the identical rules on three coins it had never seen. It scored between 1.70 and 1.88 on every one. That rules out the usual explanation: logic bent to fit one chart cannot generalise to four.

Then we ran all four forward through the following six months. Every one of them lost. Combined, −$2,834 across 154 closed trades. Four assets breaking in the same window is not a broken rule — it is a change in the market. This is a trend-following system, and there has not been a trend to follow.

The damage is one-sided. The short trades account for −$2,694 of it; the long trades come to −$139 — close to flat. That is a real finding about which half of the method survived, and it is the only change the evidence actually supports.

ADA · the two halves

First sixteen months2024-10-01 → 2026-02-11

+$9,255

realised on $500 starting capital, 289 closed trades

Win rate58.1%Profit factor1.83Longs19 · +$1,871Shorts270 · +$7,385

The six months after2026-02-11 → 2026-08-04

−$860

realised on $500 starting capital, 48 closed trades · 1 still open (+$1,594), not counted

Win rate47.9%Profit factor0.84Longs2 · +$392Shorts47 · −$1,252

ADA trade log

48 closed trades · 23 winners · net −$860 on $500 · 1 still open, not counted

Entered	Side	Entry	Exit	Held	Result	Closed by
2026-08-02 01:00	long 2×	0.1764	—	2.5d	+$1,594* +9.0%	still open
2026-07-27 14:00	short	0.1590	0.1628	1.4d	−$218 −2.4%	short stop
2026-07-17 02:00	short	0.1598	0.1660	14h	−$368 −3.9%	above sma220
2026-07-12 00:00	short	0.1637	0.1644	2.6d	−$41 −0.4%	short stop
2026-06-27 19:00	short	0.1453	0.1495	3.3d	−$283 −2.9%	above sma220
2026-06-25 19:00	short	0.1411	0.1415	1h	−$28 −0.3%	target 10pct
2026-06-25 17:00	short	0.1446	0.1423	1h	+$154 +1.6%	target 10pct
2026-06-25 15:00	short	0.1432	0.1428	1h	+$27 +0.3%	target 10pct
2026-06-25 13:00	short	0.1389	0.1428	1h	−$279 −2.8%	target 10pct
2026-06-24 18:00	short	0.1417	0.1412	1h	+$35 +0.3%	target 10pct
2026-06-24 16:00	short	0.1416	0.1401	1h	+$104 +1.1%	target 10pct
2026-06-24 14:00	short	0.1454	0.1439	1h	+$100 +1.0%	target 10pct
2026-06-24 11:00	short	0.1483	0.1454	2h	+$186 +2.0%	target 10pct
2026-06-18 15:00	short	0.1604	0.1472	5.8d	+$723 +8.2%	target 10pct
2026-06-10 23:00	short	0.1607	0.1707	18h	−$583 −6.2%	short stop
2026-06-10 21:00	short	0.1595	0.1602	1h	−$41 −0.4%	target 10pct
2026-06-10 10:00	short	0.1607	0.1596	1h	+$64 +0.7%	target 10pct
2026-06-10 08:00	short	0.1595	0.1604	1h	−$53 −0.6%	target 10pct
2026-06-10 06:00	short	0.1605	0.1614	1h	−$53 −0.6%	target 10pct
2026-06-10 04:00	short	0.1615	0.1604	1h	+$64 +0.7%	target 10pct
2026-06-10 02:00	short	0.1619	0.1624	1h	−$29 −0.3%	target 10pct
2026-06-10 00:00	short	0.1663	0.1648	1h	+$84 +0.9%	target 10pct
2026-06-09 22:00	short	0.1651	0.1653	1h	−$11 −0.1%	target 10pct
2026-06-09 20:00	short	0.1681	0.1661	1h	+$110 +1.2%	target 10pct
2026-06-09 18:00	short	0.1669	0.1685	1h	−$89 −1.0%	target 10pct
2026-06-09 16:00	short	0.1620	0.1652	1h	−$188 −2.0%	target 10pct
2026-06-09 14:00	short	0.1663	0.1631	1h	+$180 +1.9%	target 10pct
2026-06-04 05:00	short	0.1967	0.1978	1h	−$52 −0.6%	target 10pct
2026-06-04 03:00	short	0.1998	0.1990	1h	+$37 +0.4%	target 10pct
2026-06-03 23:00	short	0.2004	0.1978	1h	+$120 +1.3%	target 10pct
2026-06-03 21:00	short	0.2055	0.2026	1h	+$128 +1.4%	target 10pct
2026-06-03 19:00	short	0.2048	0.2023	1h	+$110 +1.2%	target 10pct
2026-06-03 17:00	short	0.2099	0.2084	1h	+$64 +0.7%	target 10pct
2026-05-24 14:00	short	0.2429	0.2088	9.5d	+$1,099 +14.0%	target 10pct
2026-05-15 13:00	short	0.2580	0.2499	8.3d	+$238 +3.1%	short stop
2026-05-06 00:00	long 2×	0.2608	0.2679	7.5d	+$392 +2.7%	below sma220
2026-04-29 18:00	short	0.2417	0.2493	1.6d	−$234 −3.1%	above sma220
2026-04-14 19:00	short	0.2404	0.2490	1.0d	−$276 −3.6%	above sma220
2026-04-12 06:00	short	0.2420	0.2486	1.7d	−$216 −2.7%	short stop
2026-04-02 02:00	short	0.2406	0.2484	1.6d	−$265 −3.2%	above sma220
2026-03-30 20:00	short	0.2439	0.2520	1.4d	−$281 −3.3%	short stop
2026-03-26 09:00	short	0.2575	0.2505	4.0d	+$224 +2.7%	short stop
2026-03-24 17:00	short	0.2592	0.2717	15h	−$418 −4.8%	above sma220
2026-03-20 18:00	short	0.2637	0.2633	2.8d	+$13 +0.1%	short stop
2026-03-05 17:00	short	0.2667	0.2620	4.4d	+$150 +1.8%	short stop
2026-03-03 08:00	short	0.2659	0.2808	1.3d	−$504 −5.6%	above sma220
2026-02-28 06:00	short	0.2629	0.2754	13h	−$449 −4.8%	short stop
2026-02-23 18:00	short	0.2634	0.2701	1.6d	−$247 −2.5%	short stop
2026-02-22 14:00	short	0.2720	0.2736	22h	−$57 −0.6%	short stop

* A position marked still open never hit an exit condition — the study period ended while it was running. Its figure is marked to the last price, not a booked result, and it is excluded from every total on this page.

SOL · the two halves

First sixteen months2024-10-01 → 2026-02-11

+$5,309

realised on $500 starting capital, 253 closed trades

Win rate56.9%Profit factor1.72Longs30 · +$1,919Shorts223 · +$3,390

The six months after2026-02-11 → 2026-08-04

−$1,635

realised on $500 starting capital, 43 closed trades

Win rate41.9%Profit factor0.50Longs9 · −$457Shorts34 · −$1,178

SOL trade log

43 closed trades · 18 winners · net −$1,635 on $500

Entered	Side	Entry	Exit	Held	Result	Closed by
2026-07-28 00:00	short	73.7300	73.9800	6.8d	−$14 −0.3%	above sma220
2026-07-24 13:00	short	74.2200	76.7100	2.4d	−$145 −3.4%	above sma220
2026-07-20 15:00	long 2×	77.7600	76.7000	2.9d	−$121 −1.4%	below sma220
2026-07-20 11:00	long 2×	77.1400	76.1500	3h	−$117 −1.3%	below sma220
2026-07-20 00:00	long 2×	76.5700	75.9200	5h	−$79 −0.8%	below sma220
2026-07-17 05:00	short	74.4000	76.3800	2.8d	−$127 −2.7%	above sma220
2026-07-11 01:00	short	77.5400	78.2600	4.2d	−$45 −0.9%	above sma220
2026-07-03 01:00	long	81.4800	78.7300	5.1d	−$168 −3.4%	below sma220
2026-06-25 13:00	short	64.2300	67.7200	10h	−$287 −5.4%	short stop
2026-06-23 08:00	short	68.7000	68.4600	1.8d	+$18 +0.3%	short stop
2026-06-09 02:00	short	65.9100	65.8800	2.4d	+$2 +0.1%	short stop
2026-06-04 11:00	short	68.7000	70.1200	1h	−$111 −2.1%	target 10pct
2026-06-04 08:00	short	69.2500	68.8600	1h	+$30 +0.6%	target 10pct
2026-06-04 06:00	short	70.3500	69.1500	1h	+$90 +1.7%	target 10pct
2026-06-04 04:00	short	70.9000	70.3500	1h	+$40 +0.8%	target 10pct
2026-06-03 19:00	short	71.9900	71.2300	1h	+$54 +1.1%	target 10pct
2026-06-03 17:00	short	73.1700	73.0900	1h	+$6 +0.1%	target 10pct
2026-06-02 23:00	short	74.2300	72.7100	4h	+$103 +2.0%	target 10pct
2026-05-27 21:00	short	82.4900	73.6700	6.0d	+$487 +10.7%	target 10pct
2026-05-22 19:00	short	84.5500	87.0800	1.0d	−$141 −3.0%	above sma220
2026-05-15 13:00	short	88.9000	87.8300	6.3d	+$56 +1.2%	short stop
2026-05-06 00:00	long 2×	86.3800	90.4300	7.6d	+$398 +4.7%	below sma220
2026-04-29 16:00	short	83.1300	84.6800	4.3d	−$81 −1.9%	above sma220
2026-04-26 15:00	long 2×	86.5600	85.9500	14h	−$62 −0.7%	below sma220
2026-04-26 04:00	long 2×	86.4500	86.0900	8h	−$37 −0.4%	below sma220
2026-04-22 00:00	long 2×	86.4800	85.9500	1.1d	−$55 −0.6%	below sma220
2026-04-07 14:00	short	78.5900	81.6300	5h	−$180 −3.9%	above sma220
2026-04-01 21:00	short	81.8600	81.8900	4.1d	−$2 −0.0%	above sma220
2026-03-26 16:00	short	87.2000	85.2600	6.0d	+$101 +2.2%	short stop
2026-03-25 00:00	long 2×	91.3200	89.2600	1.2d	−$215 −2.3%	below sma220
2026-03-21 23:00	short	87.5600	90.2300	1.5d	−$150 −3.0%	above sma220
2026-03-07 19:00	short	82.5300	85.9700	2.0d	−$214 −4.2%	above sma220
2026-02-28 06:00	short	77.5600	82.3600	12h	−$339 −6.2%	short stop
2026-02-23 00:00	short	81.3700	82.0000	2.0d	−$43 −0.8%	short stop
2026-02-18 18:00	short	81.2800	83.7100	1.5d	−$170 −3.0%	above sma220
2026-02-12 21:00	short	77.3400	81.3300	17h	−$310 −5.2%	short stop
2026-02-12 19:00	short	77.6200	76.9200	1h	+$54 +0.9%	target 10pct
2026-02-12 16:00	short	78.3000	77.6100	2h	+$52 +0.9%	target 10pct
2026-02-11 19:00	short	79.7200	79.6400	1h	+$6 +0.1%	target 10pct
2026-02-11 17:00	short	79.0100	79.8100	1h	−$60 −1.0%	target 10pct
2026-02-11 15:00	short	79.7200	78.7400	1h	+$72 +1.2%	target 10pct
2026-02-11 10:00	short	80.6900	79.9500	4h	+$53 +0.9%	target 10pct
2026-02-11 07:00	short	81.0000	80.8000	2h	+$14 +0.3%	target 10pct

All four assets

The same shape everywhere

Profit factor above 1 means the method made more than it lost. Below 1 means it did not. The first column is the period the strategy was designed against; the second is everything after.

Asset	First 16 months	Six months after	Realised after	Closed trades
ADA	1.83	0.84	−$860	48
SOL	1.72	0.50	−$1,635	43
BTC	1.88	1.02	+$10	29
ETH	1.70	0.76	−$349	34

Method

Entries need agreement across four timeframes at once — a daily uptrend, a 4-hour regime, 1-hour momentum, and price the right side of a 220-period average — plus a trigger on the 15-minute chart. Exits use progressive trailing stops. Position sizing is a fixed $1,000 notional per entry regardless of price, which is what lets the same rules run on a $0.19 coin and a $100,000 one without adjustment.

Nothing was tuned between assets or between periods. That is the entire point: a rule set adjusted until it fits is not evidence of anything. The only honest test of a strategy is the data it has never seen, which is why the second column exists.

Data: Binance 5-minute candles, 2024-10-01 → 2026-08-04. Simulated from $500 starting capital with no slippage, fees or funding costs applied — real execution would score worse than shown. Generated 2026-08-04. All research →

It worked on four coins.
Then it stopped on all four.

Not live

What we found

The strategy is not broken. It is out of season.

Tested on its original asset alone, this looked like one of the best things we had built — a 1.83 profit factor across sixteen months on ADA. The obvious next step was to make it live.

ADA · the two halves

First sixteen months2024-10-01 → 2026-02-11

+$9,255

realised on $500 starting capital, 289 closed trades

Win rate58.1%Profit factor1.83Longs19 · +$1,871Shorts270 · +$7,385

The six months after2026-02-11 → 2026-08-04

−$860

realised on $500 starting capital, 48 closed trades · 1 still open (+$1,594), not counted

Win rate47.9%Profit factor0.84Longs2 · +$392Shorts47 · −$1,252

ADA trade log

48 closed trades · 23 winners · net −$860 on $500 · 1 still open, not counted

Entered	Side	Entry	Exit	Held	Result	Closed by
2026-08-02 01:00	long 2×	0.1764	—	2.5d	+$1,594* +9.0%	still open
2026-07-27 14:00	short	0.1590	0.1628	1.4d	−$218 −2.4%	short stop
2026-07-17 02:00	short	0.1598	0.1660	14h	−$368 −3.9%	above sma220
2026-07-12 00:00	short	0.1637	0.1644	2.6d	−$41 −0.4%	short stop
2026-06-27 19:00	short	0.1453	0.1495	3.3d	−$283 −2.9%	above sma220
2026-06-25 19:00	short	0.1411	0.1415	1h	−$28 −0.3%	target 10pct
2026-06-25 17:00	short	0.1446	0.1423	1h	+$154 +1.6%	target 10pct
2026-06-25 15:00	short	0.1432	0.1428	1h	+$27 +0.3%	target 10pct
2026-06-25 13:00	short	0.1389	0.1428	1h	−$279 −2.8%	target 10pct
2026-06-24 18:00	short	0.1417	0.1412	1h	+$35 +0.3%	target 10pct
2026-06-24 16:00	short	0.1416	0.1401	1h	+$104 +1.1%	target 10pct
2026-06-24 14:00	short	0.1454	0.1439	1h	+$100 +1.0%	target 10pct
2026-06-24 11:00	short	0.1483	0.1454	2h	+$186 +2.0%	target 10pct
2026-06-18 15:00	short	0.1604	0.1472	5.8d	+$723 +8.2%	target 10pct
2026-06-10 23:00	short	0.1607	0.1707	18h	−$583 −6.2%	short stop
2026-06-10 21:00	short	0.1595	0.1602	1h	−$41 −0.4%	target 10pct
2026-06-10 10:00	short	0.1607	0.1596	1h	+$64 +0.7%	target 10pct
2026-06-10 08:00	short	0.1595	0.1604	1h	−$53 −0.6%	target 10pct
2026-06-10 06:00	short	0.1605	0.1614	1h	−$53 −0.6%	target 10pct
2026-06-10 04:00	short	0.1615	0.1604	1h	+$64 +0.7%	target 10pct
2026-06-10 02:00	short	0.1619	0.1624	1h	−$29 −0.3%	target 10pct
2026-06-10 00:00	short	0.1663	0.1648	1h	+$84 +0.9%	target 10pct
2026-06-09 22:00	short	0.1651	0.1653	1h	−$11 −0.1%	target 10pct
2026-06-09 20:00	short	0.1681	0.1661	1h	+$110 +1.2%	target 10pct
2026-06-09 18:00	short	0.1669	0.1685	1h	−$89 −1.0%	target 10pct
2026-06-09 16:00	short	0.1620	0.1652	1h	−$188 −2.0%	target 10pct
2026-06-09 14:00	short	0.1663	0.1631	1h	+$180 +1.9%	target 10pct
2026-06-04 05:00	short	0.1967	0.1978	1h	−$52 −0.6%	target 10pct
2026-06-04 03:00	short	0.1998	0.1990	1h	+$37 +0.4%	target 10pct
2026-06-03 23:00	short	0.2004	0.1978	1h	+$120 +1.3%	target 10pct
2026-06-03 21:00	short	0.2055	0.2026	1h	+$128 +1.4%	target 10pct
2026-06-03 19:00	short	0.2048	0.2023	1h	+$110 +1.2%	target 10pct
2026-06-03 17:00	short	0.2099	0.2084	1h	+$64 +0.7%	target 10pct
2026-05-24 14:00	short	0.2429	0.2088	9.5d	+$1,099 +14.0%	target 10pct
2026-05-15 13:00	short	0.2580	0.2499	8.3d	+$238 +3.1%	short stop
2026-05-06 00:00	long 2×	0.2608	0.2679	7.5d	+$392 +2.7%	below sma220
2026-04-29 18:00	short	0.2417	0.2493	1.6d	−$234 −3.1%	above sma220
2026-04-14 19:00	short	0.2404	0.2490	1.0d	−$276 −3.6%	above sma220
2026-04-12 06:00	short	0.2420	0.2486	1.7d	−$216 −2.7%	short stop
2026-04-02 02:00	short	0.2406	0.2484	1.6d	−$265 −3.2%	above sma220
2026-03-30 20:00	short	0.2439	0.2520	1.4d	−$281 −3.3%	short stop
2026-03-26 09:00	short	0.2575	0.2505	4.0d	+$224 +2.7%	short stop
2026-03-24 17:00	short	0.2592	0.2717	15h	−$418 −4.8%	above sma220
2026-03-20 18:00	short	0.2637	0.2633	2.8d	+$13 +0.1%	short stop
2026-03-05 17:00	short	0.2667	0.2620	4.4d	+$150 +1.8%	short stop
2026-03-03 08:00	short	0.2659	0.2808	1.3d	−$504 −5.6%	above sma220
2026-02-28 06:00	short	0.2629	0.2754	13h	−$449 −4.8%	short stop
2026-02-23 18:00	short	0.2634	0.2701	1.6d	−$247 −2.5%	short stop
2026-02-22 14:00	short	0.2720	0.2736	22h	−$57 −0.6%	short stop

SOL · the two halves

First sixteen months2024-10-01 → 2026-02-11

+$5,309

realised on $500 starting capital, 253 closed trades

Win rate56.9%Profit factor1.72Longs30 · +$1,919Shorts223 · +$3,390

The six months after2026-02-11 → 2026-08-04

−$1,635

realised on $500 starting capital, 43 closed trades

Win rate41.9%Profit factor0.50Longs9 · −$457Shorts34 · −$1,178

SOL trade log

43 closed trades · 18 winners · net −$1,635 on $500

Entered	Side	Entry	Exit	Held	Result	Closed by
2026-07-28 00:00	short	73.7300	73.9800	6.8d	−$14 −0.3%	above sma220
2026-07-24 13:00	short	74.2200	76.7100	2.4d	−$145 −3.4%	above sma220
2026-07-20 15:00	long 2×	77.7600	76.7000	2.9d	−$121 −1.4%	below sma220
2026-07-20 11:00	long 2×	77.1400	76.1500	3h	−$117 −1.3%	below sma220
2026-07-20 00:00	long 2×	76.5700	75.9200	5h	−$79 −0.8%	below sma220
2026-07-17 05:00	short	74.4000	76.3800	2.8d	−$127 −2.7%	above sma220
2026-07-11 01:00	short	77.5400	78.2600	4.2d	−$45 −0.9%	above sma220
2026-07-03 01:00	long	81.4800	78.7300	5.1d	−$168 −3.4%	below sma220
2026-06-25 13:00	short	64.2300	67.7200	10h	−$287 −5.4%	short stop
2026-06-23 08:00	short	68.7000	68.4600	1.8d	+$18 +0.3%	short stop
2026-06-09 02:00	short	65.9100	65.8800	2.4d	+$2 +0.1%	short stop
2026-06-04 11:00	short	68.7000	70.1200	1h	−$111 −2.1%	target 10pct
2026-06-04 08:00	short	69.2500	68.8600	1h	+$30 +0.6%	target 10pct
2026-06-04 06:00	short	70.3500	69.1500	1h	+$90 +1.7%	target 10pct
2026-06-04 04:00	short	70.9000	70.3500	1h	+$40 +0.8%	target 10pct
2026-06-03 19:00	short	71.9900	71.2300	1h	+$54 +1.1%	target 10pct
2026-06-03 17:00	short	73.1700	73.0900	1h	+$6 +0.1%	target 10pct
2026-06-02 23:00	short	74.2300	72.7100	4h	+$103 +2.0%	target 10pct
2026-05-27 21:00	short	82.4900	73.6700	6.0d	+$487 +10.7%	target 10pct
2026-05-22 19:00	short	84.5500	87.0800	1.0d	−$141 −3.0%	above sma220
2026-05-15 13:00	short	88.9000	87.8300	6.3d	+$56 +1.2%	short stop
2026-05-06 00:00	long 2×	86.3800	90.4300	7.6d	+$398 +4.7%	below sma220
2026-04-29 16:00	short	83.1300	84.6800	4.3d	−$81 −1.9%	above sma220
2026-04-26 15:00	long 2×	86.5600	85.9500	14h	−$62 −0.7%	below sma220
2026-04-26 04:00	long 2×	86.4500	86.0900	8h	−$37 −0.4%	below sma220
2026-04-22 00:00	long 2×	86.4800	85.9500	1.1d	−$55 −0.6%	below sma220
2026-04-07 14:00	short	78.5900	81.6300	5h	−$180 −3.9%	above sma220
2026-04-01 21:00	short	81.8600	81.8900	4.1d	−$2 −0.0%	above sma220
2026-03-26 16:00	short	87.2000	85.2600	6.0d	+$101 +2.2%	short stop
2026-03-25 00:00	long 2×	91.3200	89.2600	1.2d	−$215 −2.3%	below sma220
2026-03-21 23:00	short	87.5600	90.2300	1.5d	−$150 −3.0%	above sma220
2026-03-07 19:00	short	82.5300	85.9700	2.0d	−$214 −4.2%	above sma220
2026-02-28 06:00	short	77.5600	82.3600	12h	−$339 −6.2%	short stop
2026-02-23 00:00	short	81.3700	82.0000	2.0d	−$43 −0.8%	short stop
2026-02-18 18:00	short	81.2800	83.7100	1.5d	−$170 −3.0%	above sma220
2026-02-12 21:00	short	77.3400	81.3300	17h	−$310 −5.2%	short stop
2026-02-12 19:00	short	77.6200	76.9200	1h	+$54 +0.9%	target 10pct
2026-02-12 16:00	short	78.3000	77.6100	2h	+$52 +0.9%	target 10pct
2026-02-11 19:00	short	79.7200	79.6400	1h	+$6 +0.1%	target 10pct
2026-02-11 17:00	short	79.0100	79.8100	1h	−$60 −1.0%	target 10pct
2026-02-11 15:00	short	79.7200	78.7400	1h	+$72 +1.2%	target 10pct
2026-02-11 10:00	short	80.6900	79.9500	4h	+$53 +0.9%	target 10pct
2026-02-11 07:00	short	81.0000	80.8000	2h	+$14 +0.3%	target 10pct

All four assets

The same shape everywhere

Profit factor above 1 means the method made more than it lost. Below 1 means it did not. The first column is the period the strategy was designed against; the second is everything after.

Asset	First 16 months	Six months after	Realised after	Closed trades
ADA	1.83	0.84	−$860	48
SOL	1.72	0.50	−$1,635	43
BTC	1.88	1.02	+$10	29
ETH	1.70	0.76	−$349	34

Method

It worked on four coins. Then it stopped on all four.

The strategy is not broken. It is out of season.

The same shape everywhere

It worked on four coins. Then it stopped on all four.

The strategy is not broken. It is out of season.

The same shape everywhere

It worked on four coins.
Then it stopped on all four.

It worked on four coins.
Then it stopped on all four.