I believe your calculation is correct but you can also get "free" data lines for a sufficiently active or large account. Check out the impact of monthly commissions and portfolio value under "How Market Data is Allocated" at
There may be other reasons to use a different real-time data provider. For example, when lag or choppiness of the data are important, when brief interruptions during the maintenance window cause issues, or when time stamps with resolutions of less than one second are required. Keep in mind that IB is not a data provider and their infrastructure is optimized to support human-centric trading via TWS and trade automation via the TWS API.
It looks like polygon.io
JR
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On Tue, Aug 10, 2021 at 12:11 PM, Luke wrote:
I just want to double check if the information i found is correct for TickByTick data. By default user has 100 market data lines and each tbt data for one ticker is worth 100 lines. You get minimum 3 tickers, which is essentially equivalent of 300 lines.
If you would want 4 tickers tho, you would need 400 lines, but that would mean buying 3 booster packs, which is $90 for 4 tickers using tbt. Meaning, if you want 10 tickers using tbt, you need to get 9 booster packs, which is $270 per month for 10 tickers? With hard limit being 10 booster packs, which means the max you can have is 11 tickers using tbt.
Let me please know if i got it right.?
If that is the case, then it seems obvious something like Polygion.io, which is offering i believe unlimited tickers for $200 is a better deal.
