BATS quote vs. regular real-time

I was wondering. I know that BATS is the third largest market center for stocks. If I use a service like freestockcharts.com, which uses the BATS exchange for its data, will there be any difference with a real streaming service that gets its quotes from all of the ECNS? If there is a difference, then by how much?
 
Are the securities you are looking at using BATS as their primary listed exchange? If yes, then there will not be a tremendous difference (except in depth of book and size, but not price), if no, then there will be a significant difference in terms of price, size and depth of book.
 
Here is what I am trying to do. Sometimes I am not at my home computer or using my home network which I am confident is secure. However, sometimes I am out at different places with my laptop using an unsecure wifi network or at a computer that is not my laptop. I don't want to login into my brokerage account to get charts and quotes on unsecured networks/computers. So there is a service called www.freestockcharts.com where I can see the market and get quotes/charts, but it uses the BATS exchange.

I honestly don't know which stocks primarily trade on the BATS. Lets say some of the more popular stocks like Apple and Google. Would those have much of a difference then a real ecn?
 
Quote from WinstonTJ:

...if no, then there will be a significant difference in terms of price, size and depth of book.

Why significant price differences?

Thanks.
 
It depends on what you are after.

If you are manual trading and you don't care about a few pennies then the prices will be as good as any other service. If you care about pennies, the exact spread and depth of book then you probably want a real data feed. If you are trading market orders via a retail broker then none of it matters anyway.

Why are there differences - because you will normally see a securities primary listed exchange have the best price and volume. Securities often trade on other exchanges - but the other exchanges are not always on the NBBO. To me, pennies are a big deal, to others maybe not so much.
 
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