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Three days to +121%, then the exchange said no

Dmitrii Balabanov
Dmitrii Balabanov
September 3, 2026 · 5 min read

The sports odds route had a deadline on the morning of September 1: become tradable or get out of the way. It still had no reliable two-source mapper, so the cycle stepped out of the way and went back to the one market family with a clean external price feed — crypto. What followed was the best trade in the account’s history, though it did not look like one for most of the three days.

Day one: an entry, then a cheaper one

Will Bitcoin reach $80,000 August 31 – September 6? BTC was around $78,742, the barrier only 1.6% above, roughly six days left. A touch approximation made the 71c YES price look cheap after a haircut. Bought 2 YES at 0.71, 1.42 USDC. The risk was written down at the time: a weekly touch contract is path-dependent, and the entry will look terrible fast if spot drifts the wrong way.

Spot drifted the wrong way. By 22:00 BTC was $77,156 and the first entry had marked down sharply. The cycle did not average down on reflex; it re-ran the model against the live book. Barrier now 3.7% away, 5.4 days left, 30-day realized vol about 43%. The reflection-principle touch estimate gave roughly 49% raw; after a 15% haircut, 42%, against a 34c ask — about 7.5c of edge. Bought 3 YES at 0.34, 1.02 USDC. Five shares, average 0.488.

The uncomfortable part, noted that night: the morning model had been too optimistic. A touch probability that caps out near 100% is a warning, not a green light. The evening number was the realistic one, because it used the lower spot, the remaining time, a haircut and the actual book.

Day two: an add that barely qualified, then a hold

The morning of September 2 checked the exit triggers first — profit-lock bid not reached, BTC above the cut zone, fair still above the bid — then re-priced. Binance was unreachable from the runtime, so the source path was Coinbase spot (about $77.6k) plus CoinGecko daily history. Raw touch probability near 54%, 46% after haircut, ask 39c: marginal edge 6.7c, just over the 6c add gate. Bought 3 YES at 0.39, 1.17 USDC. Eight shares, cost 3.61 USDC, average 0.45125.

By evening the model had cooled again: BTC $77.3k, 4.37 days left, book 0.27 / 0.28, fair after haircut 31.8%. Above the 27c bid, so selling was wrong; only 3.8c above the ask, so adding was wrong too. Hold, with the levels and the deadline written down.

Fair value had gone from 46% to 32% in one day. A weekly touch model is extremely sensitive to remaining time, the volatility choice and spot drift; the honest response is to respect the new number rather than defend the old one.

Day three: hold, build something uncorrelated, then resolve

September 3, 10:00: BTC $77.8k, book 0.35 / 0.36, fair 37.9%, 1.9c of edge against the ask — nowhere near the add gate. Profit-lock (YES bid ≥ 0.55) and cut (BTC below $76k with a bid ≥ 0.18) both untriggered. Hold.

Rather than end the cycle as a passive hold, it started a Fed watch: the September FOMC is the 15th–16th, press conference on the 16th, and the September no-change market was the most liquid uncorrelated candidate on the screen (about 609k liquidity, 960k daily volume, YES ask 0.476). It could not be traded: CME FedWatch returned 403, and without an external probability there is no fair value.

Then BTC crossed $80,000 during the day.

Resolved YES: 8 shares, cost 3.61 USDC, payout 8.00 USDC, profit +4.39 USDC (+121.3%). Balance 30.90 USDC.

The thesis was simple throughout — BTC near $80k with days left, the reflection principle giving a high touch probability, a market price well below it. It was also underwater for most of its life. The position was built across three cycles with the model re-run before every add and one add refused, and it was small enough that the drawdown in the middle never forced a decision.

Then the exchange said no

Flat again, the evening screen went straight to the next candidate: bitcoin-above-80k-on-september-4-2026. Spot $81,432, 1.8% above the threshold, about 21 hours to resolution. Volatility regime stable (30d 45.5%, 7d 48.3%). Fair probability 0.788, YES ask 0.70, edge after a 3c haircut +5.77c — clearing the gate under every volatility scenario.

The order went out through the SOCKS tunnel three ways: direct, via SOCKS, as GTC instead of FOK. All three came back HTTP 503, “trading is disabled”. Balance, books, markets and open orders all read fine. Not a geoblock, not an auth failure — an exchange-wide halt on the order endpoint.

The cycle wrote a retry with a deadline (10:00 the next morning), a secondary candidate in case the first was too close to resolution (BTC above $82k on September 5 at 0.333, +5.25c, but failing under a 35% vol scenario), and stopped. Pivoting to a worse market because the better one is temporarily unreachable would have been the wrong kind of activity.

Two things from the week, then. The weekly touch model works when its inputs are fresh and its sizing leaves room to be wrong for a while. And infrastructure can block a good trade — which is an operational dependency to be retried, not a reason to lower the bar.