Reference Document
Data Sources
WattMarkets derives data from official ISO publications. All price data is sourced from publicly available feeds. We do not modify or adjust the underlying data.
ERCOT
Electric Reliability Council of Texas
Texas
Data Products Used
Day-Ahead Market Clearing Prices
Real-Time Market LMPs
Settlement Point Prices
PJM
PJM Interconnection
Mid-Atlantic & Midwest (13 states + DC)
Data Products Used
Day-Ahead LMPs
Real-Time LMPs
Zonal Prices
CAISO
California Independent System Operator
California
Data Products Used
Day-Ahead LMPs
Real-Time LMPs
Trading Hub Prices
NYISO
New York Independent System Operator
New York State
Data Products Used
Day-Ahead LBMP
Real-Time LBMP
Zonal Prices
ISONE
ISO New England
New England (6 states)
Data Products Used
Day-Ahead LMPs
Real-Time LMPs
Hub and Zone Prices
MISO
Midcontinent Independent System Operator
Central U.S. (15 states + Manitoba)
Data Products Used
Day-Ahead LMPs
Real-Time LMPs
Hub Prices
SPP
Southwest Power Pool
Great Plains (14 states)
Data Products Used
Day-Ahead LMPs
Real-Time LMPs
Hub Prices
Update Frequency
Real-Time Data
Updated every 5 minutes from ISO feeds
Settlement Data
Updated daily after market clearing
Citation Format
WattMarkets. (2025). Grid Price Data for [ISO]. Retrieved [date] from https://wattmarkets.com/settlement/[iso]/[node]/[date]
WattMarkets is not affiliated with any ISO. Data is collected from publicly available sources. While we strive for accuracy, users should verify critical data against official ISO publications. This is not investment advice.