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Tom Preston Explains the Options Metric He Invented 25 Years Ago

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Breakdown

0:00lesson

Probability of touching explained

  • Probability of touching = chance stock hits a price between now and expiration
  • Example: Meta 650 puts have 46% touch probability
  • Touch percent is different from delta or regular probability
2:23lesson

Using probability of touching for trade decisions

  • Short 650 puts have 77% chance of expiring worthless
  • If stock drops below 650, put becomes in the money
  • Probability of touching helps decide when to exit a trade
4:38lesson

Probability of touching for losing trades

  • Sold 800-805 put spread, stock drops
  • Probability of Meta rallying to 800 is 35%
  • Probability of touching helps assess recovery chances
6:56lesson

Extending time increases probability of touching

  • Probability of touching 800 strike increases to 44% with 63 days
  • More time = higher chance of larger price moves
  • Probability of touching is theoretical, not guaranteed
9:03lesson

Using probability of touching in trading

  • 20% probability of Meta touching 600 is low
  • Probability of touching helps assess trade viability
  • Use probability of touching as a tool, not a guarantee

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