A trailing stop is built from a 28-period average with bands 2 standard deviations wide. When price closes through that stop, the system bets against the break instead of following it. Trades aim for a small 9-unit target with a much wider 70-unit stop, and an opposite signal flips the position.
Best run of 2. EUR/USD, 30 min, spread 1, from run sweeps:2026-09-25-EURUSD-30m-opt.tsv:2.
| Period | Up to 2026-09-25 |
| Instrument | EUR/USD, 30 minutes |
| Spread | 1 points |
| Contracts | 1 |
| Starting capital | 1,000,000 |
| Costs | Spread only. Commissions and overnight financing are not included. |
| Bars | Up to 200,000 bars, fewer where the instrument has less history |
| Last tested | 2026-09-25 |
| positionSize Contracts per trade | 1 |
| bandPeriod Band average and deviation length | 28 |
| bandWidth Band width in standard deviations | 2 |
| takeProfitDistance Target distance in price units | 9 |
| stopLossDistance Stop distance in price units | 70 |
Every run
| Market | Timeframe | PF | Trades | Win % | Net | Max DD |
|---|---|---|---|---|---|---|
| EUR/USDBest run | 30 min | n/a | 4,817 | 63.32 | 49,894 USD | -34,199 |
| GBP/USD | 4 hours | n/a | 1,012 | 63.64 | 7,405 USD | -7,144 |
Charts
The code
Every file in the library uses the same header, the same section order and the same variable names. The numbers above were produced by the original version before the rewrite, and the rewrite has not yet been compiled in ProRealTime.
// ============================================================ // Bollinger Trailing Stop Fade // ProRealAlgos Strategy Library | prorealalgos.com // Type: Mean reversion // Direction: Long & short // Timeframe tested: 30 minutes // ============================================================ // --- Settings --- DEFPARAM CumulateOrders = false // --- Parameters --- positionSize = 1 // contracts per trade bandPeriod = 28 // band average and deviation length bandWidth = 2 // band width in standard deviations takeProfitDistance = 9 // target distance in price units stopLossDistance = 70 // stop distance in price units // --- Indicators --- upperBand = Average[bandPeriod](close) + STD[bandPeriod](close) * bandWidth lowerBand = Average[bandPeriod](close) - STD[bandPeriod](close) * bandWidth // Band trailing stop: starts on the first band break, then only tightens ONCE trailLevel = 0 ONCE trendState = 0 IF trailLevel = 0 THEN IF close CROSSES OVER upperBand THEN trailLevel = lowerBand trendState = 1 ELSIF close CROSSES UNDER lowerBand THEN trailLevel = upperBand trendState = -1 ENDIF ENDIF IF trendState = 1 THEN trailLevel = max(trailLevel, lowerBand) ELSIF trendState = -1 THEN trailLevel = min(trailLevel, upperBand) ENDIF
30 more lines: the entry and exit rules.
Read this first
Questions
Yes, it places market orders with a fixed target and stop, which ProOrder handles. The rewritten code has not been compile-checked, and the numbers come from the earlier version.
EUR/USD 30 minutes made USD 49,894 over 4,817 trades. GBP/USD 4 hours made USD 7,404.80 over 1,012 trades, with a drawdown nearly as large.
At 1 contract the EUR/USD run had a max drawdown of USD 34,199. With a 70-unit stop and a 9-unit target, a few losses can wipe out many wins, so plan for that drawdown.
Related
The ProRealAlgos community gets the full rules, the complete code and the automated portfolio.
