Help within ibkr app ... somethings I don't understand

[Wantboost]

Hi I'm paper trading . I noticed some things that I dot quite understand if u guys could help me with thx in advance

In the option chain . Why do some have a C in front of the option price.
What's red number resent under the last in the puts

I was assigned some stocks but why does position appear as -100 and the other as 800 (positive)

 

[longandshort]

Close price.

 

[BKR88]

Hi I'm paper trading . I noticed some things that I dot quite understand if u guys could help me with thx in advance

In the option chain . Why do some have a C in front of the option price.
What's red number resent under the last in the puts

I was assigned some stocks but why does position appear as -100 and the other as 800 (positive)View attachment 261534 View attachment 261535

C=Close from prior day. If no C then the price is from today's transaction.
"C" prices shown are last transaction, not mid price.
Red number is the change (lower) in price from previous day's close.
Green number is change (higher) in price from pervious day's close.
-100 because you were short 1 call that got assigned.
800 because you were short 8 puts that got assigned.

 

[Wantboost]

Thx!! Also how about in option chain builder sometimes the week is in orange and sometimes in grey ??

 

[BKR88]

Thx!! Also how about in option chain builder sometimes the week is in orange and sometimes in grey ??

The orange are currently showing strikes & prices for that week.
Click the orange headline and it will turn gray and those quotes will be removed.
Click the gray headline and the quotes for that week will be shown.

 

[trevabenefield]

‘C’ refers to the close price of that specific option.

 

[Wantboost]

How is IV calculated ? I noticed for each option week it's different? Typically higher iv higher option premium?