Offer your insights or judgment on the input financial query or topic using your financial expertise. Reply as normal question answering

Which first time Stocks and Shares ISA for UK, frequent trader UK markets? 
I wouldn't only consider the entry/exit cost per trade. That's a good comparison page by the way. I would also consider the following. This depends if you are planning on using your online broker to provide all the information for you to trade. I have lower expectations of my online broker, not meant to be harsh on the online brokers, but I expect brokers to assist me in buying/selling, not in selecting. Edit: to add to the answer following a comment. Here are three pieces of software to assist in stock selection