Relative strength index multiple-length

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A simple ranking system that combines multiple relative strength index time-series with different length.

For those who don't know what the relative strength index is. The RSI first was developed by J. Welles Wilder; it compares a stock's recent gains to its recent losses and output a number between 0 and 100, which make him a good candidate for a ranking system.
Generally it is considered bullish if the RSI rises above 30 and bearish if the RSI falls below 70.

The system was test on some US Symbols and with all the ranking calculation methods.
Results show that the less the ranking system value is the higher the system performance, which means that we should be bullish when the ranking system is within the first bucket (and also the two or three next buckets, but the first one is the most bullish) and bearish when the ranking system is within the last buckets.

This ranking system could be very helpful in designing a trading system.
You can use this item as a short ranking

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