I want to subscribe to paid services for intraday trading.Could anyone advise three topmost services?

sandp500analyst.com

There aren’t so many out there to be honest.
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I’m not sure what you mean by "paid services." Are you asking about a paid service that trades for you, or are you asking about paying commissions to a brokerage. I think the latter. You’re asking about a good broker, correct? There are more than you can count, and that’s why you’re asking. I presume you are asking about a "stock broker" and not a forex broker or futures broker.

There are several good comparison websites:

http://www.tradewiser.com/brokers.html

http://www.stocksandmutualfunds.com/broker-comparison-chart.html

Or just type "broker comparison" in the search box.
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