Direct answer: where to find daily trading range for the forex market
You can find the information you need for a forex market “daily trading range” in any dataset that provides daily high and daily low prices for a currency pair. Once you have those two values, the daily trading range for that pair is commonly defined as: Range = Daily High − Daily Low.
If your goal is to use this idea inside Bollinger Range, the most important step is not the range formula itself, but using a consistent definition and consistent inputs: same timeframe, same price basis, and the same rule for what counts as a “day.”
How it works: definitions and inputs
A “daily trading range” is a descriptive measure of how far price moved within one trading day. In practice, most market data services and charting tools expose the needed fields on a daily (1D) chart:
- Daily high: the highest traded/quoted price during the day.
- Daily low: the lowest traded/quoted price during the day.
From these, you compute the range in price terms. Depending on the platform, you may also see variants such as pips or percent range. Converting to pips usually requires knowing the pair’s pip convention; converting to percent typically uses a chosen reference price.
For Bollinger Range context, the “range” series becomes the input series. Bollinger-style methods then apply a moving average and volatility bands to that input series. To keep results interpretable, you need the range series to be computed the same way for every day.
Example: checks you can do before using the range
Two quick checks help confirm that you are actually measuring what you think you are measuring:
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Chart cross-check: open a daily view for a pair and confirm the displayed daily high and low match the values used for your range calculation.
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Price basis consistency: if your dataset offers bid, ask, or mid prices, pick one and keep it consistent. Mixing bases can change the computed range.
A third check is especially relevant for “day” boundaries: some sources align the trading day with a specific server timezone or session rule. If your provider’s daily candle boundaries differ from your expectation, the “daily” high/low can shift.
Limitations, uncertainty, and what you cannot conclude
Daily trading range is a historical measurement, not a forecast. Even if you compute it perfectly, it does not guarantee any particular future behavior.
Also, the number can differ across sources because of definitional choices:
- what exact prices are used (bid/ask/mid),
- how a “trading day” is defined (timezone/session rules),
- whether “high/low” reflects traded prices, quoted prices, or sampled ticks.
Finally, when using Bollinger Range, the bands depend on the range series you feed in. If your range definition changes (for example, different timeframe or different price basis), the bands and their interpretation will change as well.