Entered high-low-volume · point-normalized range efficiency

Bill Williams Market Facilitation Index Calculator

Calculate the MetaQuotes point-normalized high-low range per entered volume unit without confusing BW MFI with Money Flow Index.

Runs in your browserPoint size entered explicitlyZero-volume carry rule disclosed

Enter point size and ordered high-low-volume rows

Use completed bars from one symbol, timeframe, broker feed and volume type.

Entered

One row per completed bar. Commas, semicolons or tabs are accepted. Volume may be zero but cannot be negative.

BW MFI boundary: The MetaQuotes source divides the bar range by symbol point size and volume. This page reports the arithmetic and adjacent relations but withholds the platform color-state names.

Current entered-bar BW MFI

Entered Price-Volume Derivatives 1.0.0.

Derived
No BW MFI calculated yetEnter a positive point size and at least one high-low-volume row, or load the audited example.

How Bill Williams Market Facilitation Index is calculated

Range in points = (high − low) ÷ symbol point size
BW MFI = range in points ÷ volume

Version 1.0.0 follows the published MetaQuotes source buffer and normalizes price range into symbol points before dividing by the entered volume. The explicit point-size field makes the output unit auditable.

When volume is zero, the prior BW MFI is carried forward; a zero-volume first row returns zero. The calculator accepts completed bars only and does not apply the terminal source correction for a still-forming bar.

Assumptions and limits

  • Point size must match the entered symbol specification; it is not assumed from decimal appearance.
  • Rows must use one symbol, timeframe, broker feed and consistent volume type.
  • A zero-volume row carries the prior value and does not create a new quotient.
  • Spot-forex tick volume counts price changes rather than centralized executed volume.
  • The page does not emit the Green, Fade, Fake or Squat color states, market meaning or trade signals.

Worked example from the audited fixture

Reproduce it with “Load audited example”The five-bar fixture uses point size 0.0001. On the final row, high 1.1030 minus low 1.1010 equals 20 points; dividing by volume 250 gives BW MFI 0.080000. One earlier zero-volume row carries its prior value forward.

How to interpret the result

The output is price-range points per entered volume unit. Its scale changes with point size and the broker’s volume convention. The latest value is lower while volume is higher, but this page does not assign a Bill Williams color, state or signal.

Frequently asked questions

  • No. Bill Williams Market Facilitation Index divides a bar range by volume; Money Flow Index uses typical-price money-flow ratios.
  • Enter a positive symbol point size and one or more ordered high-low-volume rows from one consistent symbol, timeframe and feed.
  • The entered high minus low price range is divided by the entered symbol point size.
  • The range in symbol points is divided by the entered current-bar volume.
  • The published MetaQuotes source normalizes the price range by symbol point size before dividing by volume.
  • The prior value is carried forward; a zero-volume first row returns zero, matching the published source.
  • No. It accepts completed entered bars and does not apply the terminal source time correction for an active bar.
  • No. It reports values and adjacent relations without Green, Fade, Fake, Squat or trading classifications.

Sources and methodology

Money Flow Index CalculatorCalculate the separate typical-price money-flow ratio indicator.Force Index CalculatorWeight adjacent moving-average price change by entered volume.Observed Average Daily RangeMeasure entered high-low ranges without volume normalization.

Compare the chart feed and trading terms

Confirm the symbol point size and whether the platform supplies tick or real volume, then keep one feed and volume type across every entered observation.

XM

Review available instruments, chart-volume fields and account terms.

Check XM terms

FBS

Compare symbol specifications and chart-feed conventions for your region.

Check FBS terms

FXOpen

Confirm point size, volume type and trading conditions for the symbol.

Check FXOpen terms

Risk and affiliate disclosure: Leveraged forex and CFD trading can result in substantial losses. These are affiliate links, so ForexMT4Indicators.com may receive compensation if you register or trade through them, at no additional cost to you. Availability and terms vary by jurisdiction and broker entity.

Disclaimer: The results from this tool are estimates for educational and informational purposes only and may differ from your broker's figures. This is not financial or investment advice. Trading forex and CFDs carries a high level of risk and can result in the loss of all your capital. Always verify calculations with your broker and trade within your risk tolerance.