Bid-Ask spread in Tos and Thinkorswim

Discussion in 'Options' started by serenity options, May 12, 2020.

  1. Hi.I´m new in the forum.
    I have a real trading account with Tastyworks and a paper account in TOS.
    In my country I can´t open a real account with TOS.
    Today I was comparing the bid-ask spread for the same strike and expiration in companies with volume like SBUX,CMCSA y VZ between Tastyworks and TOS and there was a big difference.
    My paper account with TOS has 20 min delay but I was comparing the quotes taking in consideration that 20 min delay and the difference was really big.
    If in TOS the difference between bid-ask was 10%,en Tastyworks was 30%...
    It´s possible that these 2 brokers have different bid-ask spread or they are taking the quotes from the same source?
    Can happen that difference because my account with TOS is paper and quotes are not accurate?
    Thanks a lot in advance.
     
  2. guru

    guru

    They should be the same.
    Post some screenshots so that others can see the same things you're looking at.