Do all brokers block seeing book depths?

1- With IBKR basic plan, I get to see maximum 3 books order depths. Is this so with all brokers? Is there another broker or chart provider that allows multiple book depths simultaneously at a reasonable rate?

2- Is getting live stream data from another source and trading on IBKR a risk? i.e. is it possible that data / prices may not match or is there a central organization that feeds all live stream market orders to all brokers.

 

Is this about FOREX?

 

No, any stock if I open more than three order depths (called Book Trader in TWS IBKR) it tells me I have to purchase more subscriptions.

But I am also interested in the same with Forex too.

 

We do not offer FOREX but our Level 2 data for equities is up to 30 levels.

 

You need the level 2 and other depth market data that's all. Ask customer services

 

Even with Level 2 they only allow 3 books at a time and no more.

 

And how many books do you allow to be shown simultaneously or through API?

 

It depends on brokers, how much you pay for the data , trading platform etc etc etc.

for my case, I can see some ladders with just one level, and some more than 10 levels.

more level --> higher operating cost.

 

Yes, it does. But they only show 3 books and ask $30 for each other simultaneous book.

If I want to look at book depth for 100s of books their pricing doesn't make sense.

Anyone can recommend a better place I can get depth of book much cheaper? @Robert Morse why is depth of book so expensive anyway? (What is the technical challenge)

 

How can you look at 100 at same time? You mean you want to get it via API?