We looked for a rule you could actually trade. We didn't find one.
Three rounds, the predictions written down before each one ran, every number on file. The short version: the rules that pass are real, and you could not have sat through them.
One rule, 31 markets
We took the premarket fade as it is and moved it to each market's own opening time. 26 failed, 5 were close, none passed. Crude oil came nearest: only 1 of 5,000 coin flips beat it on the years it never saw, and it still scored 79, because it made nothing in the years we could see, breaks even at two ticks of cost, and keeps its money in a few late years.
Every result →Picking the exit fresh every year
Could a trader beat the fixed rule by choosing the exit time again each year from what had worked so far? No. The 3:30 exit won all sixteen years we tried it on, so the adjusting trader made the same trades as the fixed rule. Choosing from recent years alone would have lost a fifth of the money on the years never seen, and the pass with it.
Cattle and hogs
Livestock keeps its own hours, so we anchored the rule to the previous day's close. Live cattle and lean hogs lose on the years they never saw. Feeder cattle came close: 31 of 5,000 coin flips beat it, it still worked when its settings were nudged (87%), and it scored 59, a close call. But 2020 alone was 118% of what it made on the years it never saw, it went 56 months without a new high, and its typical year made $704.
What it means
Every rule that passed looks the same. It's real, and you couldn't live on it. The money lands in two or three years out of eighteen. Between them you wait 34 to 139 months for a new high, and a typical year makes hundreds of dollars on a rule whose best year makes tens of thousands. Changing the time didn't fix that. Adjusting the rule didn't. A new market didn't. Adding a condition usually made it worse, and when it helped, it helped by squeezing the money into even fewer, later years. That isn't a flaw in these rules. It's what a real edge looks like.
So the rule you could live on isn't a different rule. It's the same real rule, traded small enough to survive its own dry spell, by someone who can tell a dry spell from a dead rule. Telling those apart is what the Ledger does: every month it checks the rule against 5,000 coin flips on the same days and says whether it is still real or has become a coin. The third-Friday rule read as a coin for seventeen months, then made all of its money. The Ledger describes. It never tells you what to do.
Changing the time. Adjusting the rule. A new market. Adding a condition. We wrote 22 predictions before the runs and 14 came true; every miss was the same mistake, guessing too few trades.
A fourth round of the same. A new search needs a new question, and the record points at one: can a person hold a real rule through the years the record says are coming, if it's sized to the dry spell and the Ledger tells him the truth each month?
That question, tested forward in public: the Shelf's three rules, one contract each, sized from the record, marked every month from September 2026. Published either way.
The Shelf →