The stock of Discover Financial Services DFS is trading lower on Tuesday, following a notable gain of over 7.5% the previous day. Analysts link this rise to the announcement that interim CEO J. Michael Shepherd will remain in his position until Capital One Financial Corporation COF completes its acquisition of Discover.

The surge in stock price faced obstacles as it approached the $170.50 mark, a significant resistance level. This development has prompted our technical analysis team to designate it as our Stock of the Day.

Resistance defines a price point or zone where there is considerable selling interest, contrasting with scenarios where buying pressure can drive prices higher. When a stock is on an upward trajectory, the absence of sufficient sell orders allows buyers to push prices higher. To secure shares, investors must often outbid fellow buyers, thereby creating upward momentum.

However, in a resistance area, the dynamic shifts. Here, the number of shares available for sale is equal to or exceeds buy orders, resulting in halted rallies. This is why breakout attempts frequently stall when they encounter resistance.

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The presence of resistance at $170.50 is not coincidental. As illustrated in the accompanying chart below, this level served as support in November, January, and February.

Price points that previously acted as support often transform into resistance, a phenomenon observed throughout various financial markets. This shift can be attributed to investor psychology.

Investors who acquired shares of Discover while it was at support likely felt pleased with their decision as the stock price rose. However, when that support broke in early March, many were left regretting their purchases as their profitable positions flipped to losses. Some opted to hold their shares, determining that selling at break-even would be ideal if the price returned to their acquisition range.

This led to a concentration of sell orders when Discover’s prices rose once more to this level, ultimately converting the former support into a resistance barrier.

When considering selling strategies for a rallying stock, investors often logically place orders at previous support levels, anticipating that these levels might now act as resistance.

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