Help with understanding this unusual options activity

The below is from an Optionhacker.com recent alert:

Please help me understand what the Impact=4281/$483K is.

Also vega=$1170 . How is this converted to a dollar value?

I understand the rest of what's presented.

Many thanks for any help.
 
The below is from an Optionhacker.com recent alert:

Please help me understand what the Impact=4281/$483K is.

Also vega=$1170 . How is this converted to a dollar value?

I understand the rest of what's presented.

Many thanks for any help.


Vega=($change in the position/1 vol change in the option).
I think impact is Volume*%Delta. It's represented in shares and in dollars.
 
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