I'm out of this and into ARS. Take a look as it has a lot going for it and the few extra pence you'll wait for here could be put into a far better stock.
Price goes up and you panic? I wouldn't dream of TELLING anybody what to do. It was a SUGGESTION based on your naive questions. Don't bother replying, I'm filtering you.
And going by your previous postings, you know even less than I do about buying/selling shares. With all respect, I would suggest you refrain from buying any more stocks until you understand a little better. You will learn from a bit from your existing holdings.
Neither of you should be buying shares if you can't work it out: add up all the money he's spent on this share, then divide by the number of shares he holds. That will give you his average price per share. If the average price is higher than £6.40, then he will lose the difference. If his average is lower than £6.40 then he will be in profit.
If you add in the average costs involved to purchase 100 shares, it'll be about 640p, so not worth buying at a higher price. My average is £8.95 so I'm on a loser here.
Yeah, long term future when I got in here 'long term' ago at 58p average. If you get in now, you may make a few quid, but I'm not going to bother averaging down as I wrote this one off long ago.