Double Bollinger Band Strategy: Three Zones, One Rule

By Uladzimir Leuchankou, founder of Signal2Forex · 4 November 2026

Double Bollinger bands — Bollinger Bands 20, 2.0 plus Bollinger Bands 20, 1.0 on one chart. Daily or four-hour candles.

What is the double Bollinger band strategy? Most pages answer with the setup — two Bollinger band indicators on one chart, one at two standard deviations and one at one. I suppose that is an answer too. But for me the strategy is the rule that comes with the two indicators. The rule is short: trade only when a daily candle closes in an outer zone, and do nothing while price sits in the middle.

This is the version I find easiest to check and to code — one rule, no extra filters. The table above holds the method. Everything below is about the details — the settings, the exit, one real move on GBP/USD this autumn, and the places where the zones fail.

Bollinger bands in one formula

What are the Bollinger bands? John Bollinger built them in the early 1980s as a volatility envelope. The middle line is a simple moving average of closing prices, usually 20 periods. Add two standard deviations of the same 20 closes and you get the upper band. Subtract two and you get the lower band. That is the full indicator — three lines, two parameters.[1]

A standard deviation is one number: how far the last 20 closes typically sit from their average. On a quiet week the number is small and the bands stay close to the price. On a week with a central bank meeting the number grows and the bands open up. This is the useful part of the Bollinger band indicator — the width adjusts itself, you do not have to.

How many closes stay inside the bands? Many pages say 95%. That figure assumes prices follow a normal bell curve, and prices do not. Bollinger himself puts the real share nearer to 88–89%. So about one close in nine lands outside the outer band. For me that number matters every time a candle pushes through the band — it is a normal event, and on its own it says nothing about a reversal.

Double Bollinger band settings

The double Bollinger bands add a second copy of the same indicator with deviation 1.0 instead of 2.0. Same period, same price — Close — and the same moving average in the middle, so the two copies share one centre line. The idea comes from Kathy Lien’s book “The Little Book of Currency Trading” — Wiley, 2010 — and the settings have not changed since.

In MetaTrader 5 the path is Insert, Indicators, Trend, Bollinger Bands. Set period 20, deviation 2.0, apply to Close, pick a colour. Then add the indicator a second time with deviation 1.0 and a second colour. MetaTrader 4 has the same menu and the same fields. Two minutes, and the chart shows five lines and three zones.

People ask me about other double Bollinger band settings — a period of 10, a deviation of 2.5, an EMA instead of the SMA. All of them draw a chart. The problem is that every change moves the zone edges, and the rule in the table was tested on 20 with 2.0 and 1.0. If you change the numbers, you need to test the rule again from zero, on your pair and on your timeframe.

In MQL5 the entry check is short. Two calls to iBands — one with deviation 2, one with deviation 1 — and a test that the last closed bar sits between the two upper lines. The exit is the harder decision. For me this is where the real work of the strategy is, and the settings question never touches it.

My question was simple: does the trade close on the first candle back in the neutral zone, or only on a close under the middle line? The first version leaves earlier and gives back less of the move. The second stays longer and lets the account swing harder against you. This page uses the first — a close back inside the middle, and the trade is over.

Double Bollinger band strategy rules

The double Bollinger band strategy has one entry condition. A daily candle closes inside the buy zone — above the upper 1 band — and you buy at that close. The mirror image gives the short: a close inside the sell zone, below the lower 1 band. A close exactly on the band is not inside the zone. A wick that touches the band and pulls back is nothing at all.

Holding is the second part, and it is simpler. While daily closes stay above the upper 1 band, you stay long. When a candle closes back inside the neutral zone, you close the trade on that close. There is no target and no counting of pips. The zone tells you when the move is over, and the zone is usually later than you would like.

The stop loss is the third part, and here I differ from most guides. Many traders put the stop at the middle line — the 20-period average. Why not there? On a daily chart that stop is often 100 pips and more from the entry, and for me that is too far.

I prefer the low of the entry candle for a long and its high for a short. If that distance is bigger than the amount you agreed to lose on one trade, you skip the trade. The next close will come.

A beginner reads the three zones as three signals: buy, wait, sell. An experienced trader reads them as two bans and one permission. The sell zone bans longs. The neutral zone bans everything. Only the buy zone gives permission for a long, and even then the candle has to close there. This difference in reading is why two people with the same chart end the month with different accounts.

GBP/USD before the Bank of England

The best way to show the zones is a move that happened this autumn, with real dates. On 14 October 2026 GBP/USD made its low of the year at 1.3137. Three weeks later, on 2 November, the pair traded just under 1.3450 — about 310 pips higher.

The Bank of England meets on Thursday 5 November at 12:00 GMT. The market expects the first rate increase since August 2023, from 3.75% to 4.00%. At the September meeting the vote to hold was 6–3, with three members already asking for the increase.[3]

How does the rule read a move like this? A fall to a yearly low usually ends with closes in the sell zone. The first close back inside the neutral zone is the signal for a short seller to leave. It is not yet a signal to buy — the middle zone bans new trades in both directions.

The buy signal comes later, on the first daily close above the upper 1 band, and on a 310-pip climb that close arrives when a good part of the move is already behind you.

This is the part most people dislike about the double Bollinger bands trading strategy. You never catch the low. You enter late, you exit late, and in exchange you are only ever in trades that the market has already confirmed with a close.

On a $10,000 account trading one standard lot, 100 pips of GBP/USD are worth about $1,000. On a $100 cent account with 0.01 lot the same 100 pips are $10. The late entry costs the same share of the move in both cases, and so does the protection.

I do not know what the pound does at 12:00 GMT on Thursday. A 0.25% increase is already in the price. So the decision itself may move the pair less than the vote count and the new forecasts. The Wednesday candle will close in one of the three zones — and that is the only input the rule needs.

Where the zones fail

The strategy needs a trend. Take a pair that has spent a month inside 80 pips. The bands sit tight, price crosses the 1 band every second day, and the rule produces five entries with five exits a few pips away. Each round trip costs the spread, and on a cent account the spread is a real share of a 20-pip trade. In such a month the right trade is no trade.

News candles are the second problem. A rate decision can print a daily candle that opens in the neutral zone and closes deep in the buy zone. The rule says buy at the close. The next candle often gives a large part of it back. On a decision day like 5 November I would rather wait for a second close in the zone. The price of that wait is the first part of a real move.

The third problem is the one from the first section. About one close in nine lands outside the outer band. People see a close above the upper 2 band and sell, because the price looks too high. Bollinger’s rules say the bands show where price is high and low relative to its average — they do not say that high must fall.

His rule 22 puts it in one sentence: “Bollinger Bands do not provide continuous advice”.[2] A close beyond the outer band is a strong trend, and in a strong trend I hold.

Our Forex V Portfolio robots trade 14 currency pairs on H1 with fixed rules written in code, and the real account they trade streams live on YouTube. A robot does not hesitate on a news day — a manual trader does. For manual charts the free Smart Trend Trading System for MT5 is another way to ask the same question the two bands ask — is this pair trending right now, or not.

Before you ask

Not everyone agrees with trading the zones this way. Range traders use the same bands in reverse — they sell at the upper band and buy at the lower one. In a quiet month they are right more often than a zone trader. So who is right? The difference is the size of the win.

Take two made-up accounts. The range trader takes 30 pips many times and gives back 150 once. The zone trader loses 40 pips a few times and takes 300 once. I prefer the second kind of account — the one whose losses are small and known in advance.

Two indicators, three zones, one rule, one stop — the double Bollinger bands strategy fits on a single daily chart, and it asks very little of you except patience. The more closes you demand before you act, the fewer trades you take — and the steadier the account.

Sources: [1] MetaTrader 5 help, Bollinger Bands — formula and settings; [2] John Bollinger, Bollinger Band Rules, bollingerbands.com; [3] Bank of England, Monetary Policy Summary and Minutes, 17 September 2026; Kathy Lien, The Little Book of Currency Trading, Wiley, 2010; GBP/USD levels — market reports of 3 November 2026.