Extracted algorithm research record

The Double Bollinger Band Strategy MT4

Enters Buy (Sell) trades when price crosses above (below) 3σ and within 2σ Bollinger Bands.

Record 3166 · Catalog rank 1,228 · Mean Reversion & Counter-Trend · Subtype B1 · Snapshot 2026-10-31 15:46 UTC

Source & extraction context

Evidence label: source_code (source claim, not independent verification). Recorded completeness: 50.0/100. Neither is a performance result.

Names identify source records. Inclusion is not an endorsement or a claim of authorship, ownership or reuse permission. Check the source license before reusing any implementation.

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Extraction warnings

Build warnings

MT4_ONLY: the captured source is MQL4 / written for MetaTrader 4. It needs porting (order functions, indicator handles) before it runs on MT5.

Recorded market & execution profile

Recorded markets: EURUSD
Recorded timeframes: H1
Recorded sessions: Not specified
Recorded regime: trending|ranging|volatile

Recorded indicators & parameters

Extracted indicator stack
Indicator	Parameters	Applied to
Bollinger Bands	`{"deviations": 3, "period": 20}`	close
Bollinger Bands	`{"deviations": 2, "period": 20}`	close

Bollinger Bands Trading Algorithms

Extracted strategy rules

Recorded long-entry rules

The Ask price crosses above the 3σ upper Bollinger Band (BB3UP).
The current price is within the range of the 2σ upper Bollinger Band (BB2UP) and 2σ lower Bollinger Band (BB2LO).

Recorded short-entry rules

The Bid price crosses below the 3σ lower Bollinger Band (BB3LO).
The current price is within the range of the 2σ lower Bollinger Band (BB2LO) and 2σ upper Bollinger Band (BB2UP).

Recorded exit rules

Using an OCO format orders, both stop-loss and take-profit are set at N pips.

Recorded filters

Not specified in the extracted record.

Stop loss: N pips
Take profit: N pips
Position sizing: null

Questions about this record

What entry rules are recorded for The Double Bollinger Band Strategy MT4?

Long: The Ask price crosses above the 3σ upper Bollinger Band (BB3UP). The current price is within the range of the 2σ upper Bollinger Band (BB2UP) and 2σ lower Bollinger Band (BB2LO). Short: The Bid price crosses below the 3σ lower Bollinger Band (BB3LO). The current price is within the range of the 2σ lower Bollinger Band (BB2LO) and 2σ upper Bollinger Band (BB2UP). These are unverified extracted rules.

Which markets and timeframes are recorded?

Markets: EURUSD. Timeframes: H1. These are source-recorded labels, not verified execution behavior.