What are the best Bollinger Bands settings for forex trading?

In this guide

Common settings and their trade-offs
What matters more than the numbers
How to test a change
Related

Start with the default: a 20-period simple moving average with bands set 2 standard deviations away. It is the setting most traders and most charting platforms use, and no alternative has been shown to be reliably better across pairs and timeframes. Adjust it only for a specific reason, such as a faster or slower style of trading, and test any change on your own pair and timeframe first.

Common settings and their trade-offs

Period / Deviation	Typical use	Trade-off
10 / 1.5	Short-term trading, lower timeframes	Reacts fast, but touches the bands often and produces more false signals
20 / 2	General purpose, the standard default	Balanced, but not tuned to any particular market condition
50 / 2.5	Swing or longer-term views	Smoother and fewer signals, but slower to react

The 10/1.5 and 50/2.5 pairs follow the scaling John Bollinger himself suggested. Treat them as starting points rather than proven optimums.

What matters more than the numbers

Market condition

In a range, price often reverts toward the middle band. In a strong trend, price can "walk" along the outer band for a long time, so a touch is not a reversal signal. Price is not normally distributed, so do not read the bands as a probability of reversal.

Filter with trend strength

Checking whether a trend is actually present helps you decide whether to fade the bands or follow a breakout. See the best ADX setting and level for measuring trend strength.

Mind the middle line

The centerline is just a moving average, so its limits apply. Our guide to moving averages in forex covers SMA vs EMA and failure modes.

Avoid stacking duplicates

Bands measure volatility around price. Pairing them with an oscillator such as RSI or Stochastic can add context, but several momentum tools often say the same thing twice. See which indicators to combine without redundant signals.

How to test a change

Pick one pair and one timeframe.
Mark your entry and exit rules before looking at results.
Compare the default against one alternative over a meaningful sample, including both trending and ranging periods.
Include spreads and slippage, then check the result on a demo account before using real money.

Fitting settings to past data is easy and often fails going forward. Forex trading carries significant risk of loss, so size positions with that in mind.

Thinking about paid versions of common indicators? Read Enhanced MACD, RSI and Stochastic Indicators vs the Standard Versions, and confirm current features and pricing on the official site. For the wider picture, see Trend & Momentum Indicators Explained and MACD Explained.