We only use CEX USD prices to estimate the usd_amount. This has the benefit of excluding scam tokens, but some defi tokens might not be covered.
ERC20 balances table contains the ERC20 balances of all addresses, at every block height. Use this table to easily plot the change in the balance of ERC20 tokens for an address or a group of addresses over time.

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Sample Query

Getting the ERC20 Balances of USDC Token from an address over time. 
select * from ethereum.assets.erc20_balances
where address = '0xd387a6e4e84a6c86bd90c158c6028a58cc8ac459' -- Pranksy
and token_address = '0xa0b86991c6218b36c1d19d4a2e9eb0ce3606eb48' -- USDC Token Address
order by block_number desc

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Table Columns

Column NameDescriptionExampleColumn Name
addressAddress of the account.0xd387a6e4e84a6c86bd90c158c6028a58cc8ac459
token_addressToken address of the ERC20 token.0xa0b86991c6218b36c1d19d4a2e9eb0ce3606eb48
token_name Name of the ERC20 token.USD Coin
token_symbolToken symbol of this token.USDC
balanceBalance of this ERC20 token, normalized by the decimal points defined in the ERC20 token contract. For example, USDC has 6 decimals, so this value is the raw_balance divided by 10^6.10
raw_balanceBalance of tokens (unnormalized)10000000
usd_amountThe amount of tokens, in $USD.10
usd_exchange_rateThe exchange rate used to calculate the usd_value.1
block_timestampThe timestamp of the block that that resulted in the balance.2022-09-15 13:51:47
block_numberThe number of the block that resulted in the balance.15539508
block_hashThe hash of the block that resulted in the balance.0x25680259dfb40b4ee724ae22fda01a34e6d598c5f2fc25b6d871cb56c488de70