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Yes, the trading actually takes some time to understand... and unfortunately, most likely loosing some until you get it right.
But when you do, you will feel confident about your trades, and free money fountain will follow :)

I already lost 150 dollars, but still want to do more investment. Do you have any ideas?

It depends on what your looking for.
Personally i like to invest in things i can use that pay dividends.
Steem into SP is a good choice right now. I also like the wings with the forecasting rewards.
That should become huge within the next couple months. Atleast i hope so.
Im heavily invested into wings to be the winning ticket!

Do you know anything about voting range?

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