We are adding new coins automatically once they are listed on one of our Major coin Price Sources like CoinMarketCap or WorldCoinIndex.
Please note, that ICO coins will also be added once they are listed there.
You can find more information on how to add ICO coins in this FAQ article: Entering ICO Coins or Non Listed Assets.
We do not add new coins on request. They will be added automatically once there are trades on a known exchange.