The Relative Strength Index (RSI) is a popular tool among traders and investors. Actually, it does not compare the strength of two securities. Instead, it measures the internal strength of one security. When Wilder (the creator of the index) introduced the RSI, he recommended using a 14-day RSI. The index oscillates between 0 and 100. Look for a divergence in which the security is making a new high, but the RSI is failing to make a new high. This divergence would be an indication of a probable reversal.

If the RSI then declines and falls below its most recent trough, it is considered to have completed a failure swing. This would be considered to be a confirmation of a probable reversal. The RSI usually tops above 70 and bottoms below 30. The RSI usually forms these tops and bottoms before the underlying security. However, please be aware that a stock that is very strong can have an RSI that is well above 70 for extended periods. Thus, many short-term traders like to find high RSI stocks in order to "hop on" for a ride.

Also useful to note is when the RSI surpasses a previous peak or falls below a previous trough (low). The RSI sometimes reveals more clearly than a price chart, the location of support and resistance.

The formula is as follows.RSI = 100-[100/1+(U/D)]

Where: U = Average of upward price change D = Average of downward price change

The RSI should not be confused with our own strength algorithm (used in our Strongest Stocks and Strongest ETFs reports, and in The Valuator). The RSI measures short-term strength over the most recent 14 days. Our own algorithm finds stocks and ETFs that have what we call "persistent strength.")

To print the table, select the table by starting just before the last period above the table.  Moving the cursor down will select the table.  When shown your print options choose "selection."

The following free list is updated daily and consists of the 50 top-ranked stocks in our database (ranked by their RSI).