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A sine weighted moving average (Sine-MA) applies weights to each day in the
shape of the bulge in a sine curve from 0 to *pi*. For an N-day average
the weightings are

/ 1 \ / 2 \ / N \ sin | --- * pi |, sin | --- * pi |, ..., sin | --- * pi | \ N+1 / \ N+1 / \ N+1 /

The effect is that middle prices have the greatest weight (much like the TMA,
Triangular Moving Average). The graph below shows the weights for
*N=10*. In Chart SWMA is under “Low Priority” in the indicator lists.

Copyright 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2014, 2015, 2016, 2017 Kevin Ryde

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