The search for potential small capitalization, you can use the aggregate price sites like coingecko or coinmarketcap. You can use coinmarketcap with the "Trending / Recently Added" function to check the list of new coins added. In order to filter out potential growth currencies, you should set criteria such as.

•  New to coinmarketcap less than 20 days.

•  Trading volume is over 1 million USD.

•  Market capitalization of $ 5-25 million.

Then, you select a list of currencies that meet your criteria.