int buyPrice = 0;

    int maxFound = 90;

    private OrderAction makeDecision(GameState body, String username) {
        UserInfo userInfo = body.findUser(username);

        if(userInfo.getShares() == 0) {
            if(body.getStockValue() <= maxFound / 2) {
                buyPrice = body.getStockValue();
                return new OrderAction(OrderType.BUY, 1000000);
            }
        } else if(body.getStockValue() > maxFound) {
            return new OrderAction(OrderType.SELL, 1000000);
        }

        maxFound = Math.max(maxFound, body.getStockValue());

        return null;
    }