To have an idea, go to the losers. If you are not yet good with those good altcoins that you have then, you can have an idea for these type of gainers and losers for the day/week.
https://coinmarketcap.com/gainers-losers/
PS: DYOR.
https://coinmarketcap.com/gainers-losers/
PS: DYOR.
Yes I normally do that, but it's not easy to choose
I was looking more for a possible "sleeping giant", since the investment it's little...hard to find something looking at day/week losers.