Futures columns - Meridian

OHLCV

Column	Unit	Aggregation
`open_price`	quote	first
`high_price`	quote	maximum
`low_price`	quote	minimum
`close_price`	quote	last
`coin_volume`	base asset	sum
`dollar_volume`	quote or USD	sum

Trade flow

Column	Unit	Aggregation
`buy_trades`	count	sum
`sell_trades`	count	sum
`total_trades`	count	sum
`buy_coin_volume`	base asset	sum
`sell_coin_volume`	base asset	sum
`buy_dollar_volume`	quote or USD	sum
`sell_dollar_volume`	quote or USD	sum

Open interest

Column	Unit	Aggregation
`coin_open_interest_high`	base asset	maximum
`coin_open_interest_low`	base asset	minimum
`coin_open_interest_close`	base asset	last
`dollar_open_interest_high`	quote or USD	maximum
`dollar_open_interest_low`	quote or USD	minimum
`dollar_open_interest_close`	quote or USD	last

Use dollar open interest for cross-asset notional comparisons. Calculate percentage change from at least two dollar_open_interest_close observations.

Funding and premium

Column	Unit	Aggregation
`funding_rate`	per 8 hours	last
`funding_rate_avg`	per 8 hours	last
`premium`	ratio	last

Liquidations

Column	Unit	Aggregation
`buy_liquidations`	count	sum
`sell_liquidations`	count	sum
`buy_liquidations_coin_volume`	base asset	sum
`sell_liquidations_coin_volume`	base asset	sum
`liquidations_coin_volume`	base asset	sum
`buy_liquidations_dollar_volume`	quote or USD	sum
`sell_liquidations_dollar_volume`	quote or USD	sum
`liquidations_dollar_volume`	quote or USD	sum

Liquidation side is print side. Do not translate buy-side and sell-side prints into long and short position labels without source-specific provenance.