### Comment:
There must be something wrong with both of our calculations since ToS is clearly calculating +theta, +vega, -gamma, and +delta   
  
  
 Here's a zoomed in version to see where our math may be wrong...  [https://imgur.com/gallery/lL0Q5wJ](https://imgur.com/gallery/lL0Q5wJ)

### REPLY:
Looking at your original number of -0.2559 that seems pretty close to the \~23.28 so ToS may have multiplied it by 100, but it's still positive... Not sure how you got the negative number.   
  
  
 Additionally, if you look at the original image with the graph the *theoretical* line is below the *expiration* line so that also confirms + theta so long as we stay under the tent.   
  
  
 Thoughts?

### END.