Making money like in, win or lose a view $, or like seriously make some profit. Because most trades here don't involve more then $100 and these move the SP a lot. So in order to make money out of GERS you should be able to buy a lot low and sell a lot high. But with GERS buying a lot immediately brings the SP up, so buying low isn't possible for most. The opposite happens when you sell.
There is a reason why the chart looks like a screenshot from Tetris.
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