Can a strategy have a huge winning trade and still lose money overall?

Yes. FANG under Tenachine's turtle 55 breakout study had a single trade that returned 93.29 percent, and its full 32-trade record on that same ticker still finished at negative 1.33 percent, because the other 31 trades, most of them losses at a 28.1 percent win rate, gave back more than the one big winner made.

Does one large winning trade in a backtest prove the strategy works?

Not by itself. A single outsized trade shows the rule can catch a big move when conditions line up. Whether that trade was enough to make the whole multi-trade record profitable is a separate question, answered by the total return and the win rate across every trade, not by the best one alone.

Guide · 6 min read

One 93 percent trade still lost money across the full record

FANG's single best trade under turtle 55 breakout gained 93.29 percent. Its complete 32-trade record on the same ticker lost 1.33 percent. A second ticker under the same rule, FCX, shows the opposite ending from a similarly dominant best trade.

Updated 2026-09-21

FANG's best single trade under turtle 55 breakout returned 93.29 percent. That is not the study's total result on the ticker. It is one trade out of 32. The complete record, all 32 trades added together, finished at negative 1.33 percent. A trade good enough to nearly double the money committed to it sits inside a full history that lost money.

The rest of the record explains the gap. FANG's win rate across those 32 trades was 28.1 percent, meaning fewer than three trades in ten closed positive. The worst single trade lost 10.51 percent, and the average trade lost 0.73 percent. Gross profit across every winning trade totaled 17,977.55 dollars against gross loss of 19,311.65 dollars, a profit factor of 1.0853, barely above the breakeven line Tenachine's guide on that ratio already covers from the losing side. One spectacular trade pulled the total most of the way back toward even. It did not pull it across the line.

FANG under turtle 55 breakout, three numbers on the same ticker

Buying and holding FANG beat both the best single trade and the full trading record by a wide margin. The 93.29 percent trade was real. It was also the high point of a record that, taken whole, lost money.

A second ticker, the same rule, a different ending

FCX ran through the same turtle 55 breakout rule with a similarly lopsided best trade, 246.50 percent against a full 24-trade return of 20.64 percent, a best trade worth roughly twelve times the entire multi-trade record. The difference from FANG is that FCX's full record stayed positive. Its win rate, 37.5 percent, is higher than FANG's 28.1 percent, and its worst single trade, negative 8.62 percent, is shallower than FANG's negative 10.51 percent. FCX's other 23 trades gave back a large share of the 246.50 percent, the same pattern as FANG, but not all of it.

Best trade versus full record, two tickers, same strategy

Both tickers show the same shape, a best trade several multiples of the full record. Only one of the two full records is a loss.

Neither ticker's buy and hold return was beaten by the strategy. FCX's buy and hold return over the same window was 80.92 percent, almost four times the strategy's 20.64 percent. Tenachine's guide comparing golden cross to buy and hold on NVDA, TSLA, and AMD makes a related point about a different rule: a system built to cut losses early structurally cannot capture the full run of a stock that goes almost straight up, whichever specific rule is doing the cutting. Turtle 55 breakout adds stops and re-entries around FCX's and FANG's moves the same way golden cross does around NVDA's, trading some of the raw move away in exchange for smaller losses elsewhere in the record.

What the best trade figure is not built to tell you

A best trade figure answers one question: what was the single largest gain this rule produced on this ticker. It does not answer whether the rule made money on that ticker overall, how often it lost, or how deep those losses ran. FANG and FCX both show a best trade several multiples the size of the full record, and reading either best trade figure alone, without the win rate and the trade count next to it, would have suggested a stronger outcome on FANG than the 32-trade history actually delivered.

This is not a claim that turtle 55 breakout is a bad rule or that FANG and FCX will repeat this pattern going forward. Past performance does not predict future results, and a 24 or 32 trade sample on one ticker is a thin base to draw a permanent conclusion from. What these two records show is narrower and reusable on any backtest: check the win rate and the total trade count before treating one large trade as evidence the strategy works on that name, because the same single number, a big best trade, sits at the top of both a losing record and a winning one here.