If you are going to be Spread-Betting then you want shares that show Volatility.
You can see this very well by looking at Candlestick charts. Just look at the size of the candles !
Also think about the time span you plan to trade - are you day trading or swing trading over a longer period ?
Some people are happy range trading using channels or Bollinger Bands - again look at the charts and you will find shares that show quite distinctive Support and Resistance levels - with the price 'ranging' between the two . Beware that eventually prices will break out and a new range will be created.
Poor you, you seem to have a long list rather than a short one! Another thing I look at is the actual price of the share. I know what risks I am prepared to take with my account. For example I will take a 3% risk with my FOFLS trades because I know the system. For "hunches" I would only take a 1% risk. That to a certain extent makes some of the higher priced shares (although there are fewer of those about now) out of my price range to trade because I couldn't place the stop in my risk tolerance area.
Just another factor to throw in to the general confusion.
I have always made most money by trading one stock only. after a while you can read it fairly well. I have found RBS a bit difficult, although that is just a personal thing. The only problem I discovered is that if you start to do lots of deals in the same stock every day, D4F throw their toys out of the pram and send all your trades to a dealer which slows progress and reduces the gain / increases the loss. Be careful. Limit your number of deals and do not draw attention to yourself.
There is a lot to be said about trading a tracking stock for the whole index, rather than juggling a few singles. But if you must; then run a pre-defined screen to gather your candidates...
Any internet search engine will lead you to a website that will have a free screening program. If you can not find one you like then ask the members what screen they use, but not what they trade... You should ask them what they trade after you have asked them if they use FA or TA.
There is only one other way to make a good choice:
Please feel free to ask me if I am an idiot,
Great great great Grandson of Chief One Who Cuts Thunder