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An excellent article on the RSI appears in the current issue of SFO
(1/09) titled "Dusting off an Old Indicator (page 71).
If you haven't read it you may wish to as it will give you some new
perspectives on using it as a trading vehicle. Below
is the formula from the article and below it the AB version. Not
being a programmer can someone advise if there is any
appreciable difference in the formulas?
Dick H
The Relative Strength Formula from SFO
RSI = 100 ? (100/1 + RS)
RS = Average of N-period Up closes/Average of N-period Down closes
Note: The average Up-Dn closes is always found by using "N" as the
divisor ? a common error is to use the actual Up ?DN closes.
(according to the author)
===================================================
AB formula (Tomasz)
RSI=100-[100/(1+U/D)]
U = average of upward price closes (EMA of gains)
D = average of downward price closes (EMA of losses)
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