Let's take a look at four "toxic stocks" to sell, and when to sell them. A descending triangle pattern makes AES Corp. (AES) a sell below $11. Michaels Cos. (MIK) has been stuck in a textbook downtrend since last summer. Sell the next resistance failure. Costco's (COST) trend line break following Q2 earnings is a sell signal. A classic head-and-shoulders top in Tesla (TSLA) triggers if shares violate $240 support.

This article was written by a staff member of TheStreet.

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