The Relative Vigor Index
was created by John Ehlers
(Cybernetic Analysis For Stocks And Futures pg
58) and this is a momentum indicator
that is similar to the Accumulation Distribution
Oscillator created by Jim Waters
and Larry Williams
. He uses digital signal processing to smooth the indicator to provide clear buy and sell signals. The idea behind this indicator is that during uptrends, prices tend to close near the high and during downtrends, prices tend to close near the low. I have included strong buy and sell signals in addition to normal ones so strong signals are darker in color and normal ones are lighter in color. Buy when the line turns green and sell when it turns red. Usually the best signals I have found for this indicator is when the indicator is below the 0 line and turns green then it is usually a sign of a strong uptrend.
Let me know if there are any other scripts you would like to see me publish!