Entered high-low · aligned 13/8/5 median-price SMMAs

Alligator Indicator Calculator

Calculate the standard Jaw, Teeth and Lips smoothed moving averages, then align their fixed forward display shifts without treating a future chart position as a forecast.

Runs in your browserFixed 13/8/5 SMMAs and 8/5/3 shiftsNo sleep, wake or trade signal

Enter ordered high-low bars

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

Entered

One completed bar per line. Commas, semicolons or tabs are accepted.

Alligator boundary: The shift moves a calculated value to a later chart column; it does not calculate or predict a future price. This page reports aligned arithmetic only.

Latest fully aligned display column

Entered Bill Williams Structure Indicators 1.0.0.

Derived
No Alligator values calculated yetEnter at least 18 ordered high-low bars, or load the audited example.

How the Alligator lines are calculated and aligned

Median[i] = (High[i] + Low[i]) ÷ 2
First SMMA(N) = SMA of the first N median prices
SMMA[i] = [SMMA[i−1] × (N−1) + Median[i]] ÷ N
Jaw = SMMA(13) shifted +8 · Teeth = SMMA(8) shifted +5 · Lips = SMMA(5) shifted +3

Version 1.0.0 follows the MetaTrader SMMA seed and recurrence. The three raw sequences are calculated independently from the same entered median-price bars.

At display index d, Jaw comes from raw index d−8, Teeth from d−5 and Lips from d−3. The answer uses the latest display column backed by all three entered sequences, rather than comparing unaligned raw indices.

Assumptions and limits

  • At least 18 ordered high-low bars are required for one fully aligned standard display column.
  • Rows must be oldest to newest and use one symbol, timeframe and feed.
  • The standard periods and shifts are fixed at 13/8, 8/5 and 5/3.
  • Available history and the chosen starting row can make seeded SMMAs differ from a terminal with deeper history.
  • No line order, crossing, sleeping, waking, trend, entry or exit classification is generated.

Worked example from the audited fixture

Reproduce it with “Load audited example”The 24-bar fixture has seven display columns backed by all three shifted lines. At the latest aligned display index 26, Jaw uses source index 18 and equals 10.723646, Teeth uses index 21 and equals 15.544554, and Lips uses index 23 and equals 20.029544.

How to interpret the result

These three numbers belong to one aligned display column even though they come from different source rows. Comparing the latest raw values instead would ignore the fixed 8, 5 and 3 shifts. Their ordering is reported without assigning a trend or trade state.

Frequently asked questions

  • Enter at least 18 ordered high-low bars from one symbol, timeframe and broker feed.
  • Each entered high and low are added and divided by two.
  • The first value is the simple average of the first N median prices, followed by the published smoothed recurrence.
  • Jaw uses period 13 and shift 8, Teeth period 8 and shift 5, and Lips period 5 and shift 3.
  • At one display column the three shifted lines come from different calculation rows, so comparing the same raw index would ignore the published shifts.
  • No. A shift changes where a value is drawn on the chart; it does not use or forecast a future market price.
  • Not necessarily. Feed history, the entered starting point, symbol and timeframe can change the seeded SMMA buffers.
  • No. The page does not classify sleeping, waking, trend, crossings, entries or exits.

Sources and methodology

Gator Oscillator CalculatorMeasure aligned absolute gaps between the same three governed lines.Fractals CalculatorInspect confirmed five-bar local high and low markers.Observed Moving Average CalculatorCompare entered SMA and seeded EMA sequences without chart shifts.

Compare the chart feed and trading terms

Use one broker feed, symbol and timeframe for every entered observation, and compare the source history with your terminal before relying on a platform match.

XM

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FBS

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FXOpen

Confirm chart history and trading conditions for the entered symbol.

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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.