Northern Trust saw a positive improvement to its Relative Strength (RS) Rating on Tuesday, rising from 67 to 72.

When you're researching the best stocks to buy and watch, keep a close on eye on relative price strength.

IBD's proprietary RS Rating measures market leadership by showing how a stock's price movement over the last 52 weeks compares to that of the other stocks in our database.

Decades of market research reveals that the market's biggest winners tend to have an RS Rating north of 80 as they launch their largest runs. See if Northern Trust can continue to rebound and clear that threshold.

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Northern Trust is trying to complete a flat base with a 123.20 entry. See if it can clear the breakout price in heavy trade.

In terms of top and bottom line numbers, Northern Trust has posted three quarters of increasing earnings growth. Revenue growth has also moved higher over the same time frame.

The company holds the No. 11 rank among its peers in the Banks-Super Regional industry group. Fifth Third Bancorp and Keycorp are also among the group's highest-rated stocks.