I need to extract data from FT, mainly stock prices. What web scraping tool is the best?

There is the best one which can resolve your problem that is http://easydatafeed.com. It extracts all types of Data from any websites. Easy Data Feed, the most powerful free, open source, well working,  data extraction software and integration platform of its kind that allows developers to connect applications together quickly and easily, enabling them to exchange data. Easy Data Feed enables easy integration between existing online applications, regardless of the different technologies that the applications uses. Easy Data Feed will be open source with documented APIs and training videos that teach you how to build these connectors. Even if you are not a developer you can easily outsource your work to developers overseas because it is easy to learn how to build them. It only takes a junior developer three hours to learn, and twenty hours to master. You can read about it here: http://www.easydatafeed.com/open-source/ They also have developers you can hire to do the job for you, their skype is “easydatafeed”

There are thousands of web scraper tools and services available for collecting information from your targeted website.If you want easy and quick web scraping, you can try scraperworld web scrapers. You will find fantastic options for effective web scraping and easy to use features to get useful data from superb filters and save all the data in your database.

Data As A Service is the best option if you plan to make some real money from this website and if the data is critical for it.  You can find some good providers here Why DaaS ? They'd already have  solved the problems you have - Most of these providers have very sophisticated infrastructure designed only for web crawling. IP Blocking & Proxies- They'd have a fleet of IP Address and servers to tackle all the Blocking & Blacklisting. Most of them have great IP Rotating Solutions as part of their infrastructure. Maintenance - They'd detect the changes to the website through their quality control systems and notify you if there is a change in the website and adjust the scrapers before you even know it. You can get data with just an API Call.. Most of these providers have a data download API, which you can call periodically based on your scraping schedule to collect your data and store it in your database. More time to focus on improving your website Once you put your scraping related problems on the DaaS Provider, you get more time to work on your website and make more money out of it. You'll have to spend some money for the monthly subscription to the DaaS Provider, but this would be cheaper at the long run, due to the above reasons.

If you don’t have any knowledge about programming, web scrapers such as importio, Octoparse, Parsehub should be very helpful for you.Personally, I'd highly recommend http://www.octoparse.com/?qu if you just want to extract the stock prices. It's powerful but easy to use. And its http://www.octoparse.com/pricing/?qu can meet most of my need to extract web data from web pages. The standard trial edition support cloud extraction and can extract web data much faster.These video from http://www.octoparse.com/Tutorial may help you better understand how Octoparse can be used.http://www.octoparse.com/tutorial/extracting-stock-prices-using-regular-expression-example-financeyahoocom/?qu