question from a beginner

  1. 408 Posts.
    I have bought a few conservative stock that I plan to sit on long term but I have a little spare money to play with and take some extra risk with.

    Have a look at the attached pic and tell me, is there any catch to me buying and selling this each time it goes up and down? I know there is nothing to guarantee this trend will continue - but say it did would I be making 100% gain each time i sold?
    Hope its not a stupid question 1.jpg
 
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