Describe the problem:
Amount of tokens is correct, but the value is different.
Which exchange/wallet is this regarding?
Gate, Binance…
How did you import data into this wallet?
Public keys
What have you tried to fix this so far?
Read several Koinly Help Center articles, not found my case. Someone knows an article about this from Koinly Help Center, or know this problem?
I calculated a difference of price aprox. $0,002 per token. When holding thousands of tokens the final amount differs quite significantly. Exchanges balance match with price shown in Coingecko, that looks ok. But Koinly seems to fetch info from another source. Tokens looks cheaper on Koinly, so the final balance does…Make this sense? 
I read these to articles. There can be a difference of price depends on the source. Apparently price can be changed manually, but after thousands of transactions per year, is it necessary to amend the price for each one? Does not make sense.
https://support.koinly.io/hc/en-us/articles/9908059562908-How-Koinly-sets-the-market-price-for-your-transactions
https://support.koinly.io/hc/en-us/articles/9918901579164-Market-prices-for-XYZ-are-missing