Justo en el "maximum option pain"
What is Option Pain?
In the option market, wealth transfer between option buyers and sellers is a zero-sum game. On option expiration days, the underlying stock price often moves toward a point that brings maximum loss to option buyers. This specific price, calculated based on all outstanding options in the market, is called Option Pain. Option Pain is a proxy for the stock price manipulation target by the option selling group.
How Should I Read the Option Total Chart?
Option Pain point is represented by the lowest bar in the chart. At this price, all the options in the market have the smallest dollar value.
http://www.optionpain.com/MaxPain/Max-Pain.php