WattMarkets
ERCOTWARNING85% chance today sets July's peak · window 2:00 PM CT–4:00 PM CT

US power markets, live

Live load, zone prices, and day-ahead vs real-time across US power markets. Daily peak forecasts with public track records.

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ERCOT 85% · peak 90.1 GW · ↑PJM 0% · peak 124.2 GWNYISO 0% · peak 22.9 GWISO-NE 0% · peak 13.1 GW

ERCOT4CPtoday's load vs. current peak · cross the white line and today is the new peak

ActualForecastAvg LZ priceStatistical RangeCurrent peak
Jul max87.5 GW
Who it's for

Built for people with load on the line

Energy managers

Know which afternoons matter. Skip the rest

ERCOT 4CP →PJM 5CP →

Consultants and brokers

Put a graded call in every client report

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Developers

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The API →

The call

Daily peak odds and when to be off

Every market, every morning, in its own timezone. Graded across four ERCOT summers and backtests in PJM, New York, and New England. The window says when to be off, not the whole afternoon.

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Today's callERCOTPJMNYISOISO-NE
Forecast max90.1 GW124.2 GW22.9 GW13.1 GW
Peak to beat87.5 GW
↑ now 90.5 GW
153.8 GW31.1 GW25.3 GW
Margin+2.60 GW-29.62 GW-8.22 GW-12.14 GW
Temp anomaly+3.84°F———
Est. curtailment−1.5 GW−0.0 GW−0.0 GW−0.0 GW
p (raw → final)91% → 85%0% → 0%0% → 0%0% → 0%
chance today peaks
WARNING
85%
CLEAR
0%
CLEAR
0%
CLEAR
0%

The percentage is the chance today ends up the month's peak (ERCOT), a top-five day (PJM), or the season's peak hour (NYISO, ISO-NE).

ERCOT
Tight window opens in
—:—:—
2:00 PM CT to 5:00 PM CT · 3h, not the whole afternoon

a 4 in 5 chance the peak lands here ⓘ

PJM
Tight window opens in
—:—:—
3:00 PM ET to 5:00 PM ET
NYISO
Tight window opens in
—:—:—
5:00 PM ET to 7:00 PM ET
ISO-NE
Tight window opens in
—:—:—
5:00 PM ET to 6:00 PM ET
The spread

Day-ahead vs real-time prices

Yesterday's day-ahead prices against what real-time actually did, for every market we cover. The call above says when to be off. These say what the power cost.

Yesterday's spreadERCOTPJMNYISOISO-NEMISOCAISOSPP
DA average$54.72$49.61$46.84$43.93$40.53$49.22$43.09
RT average$44.03$76.92$56.51$52.06$34.12$53.60$32.73
Widest hour
−$100.41
9 PM CT
+$144.17
10 AM ET
+$32.38
3 PM ET
+$42.44
12 PM ET
−$56.08
7 PM EST
+$22.88
9 PM PT
−$38.83
3 PM CT
avg spread, RT minus DA
RT under DA
−$10.69
RT over DA
+$27.32
RT over DA
+$9.67
RT over DA
+$8.13
RT under DA
−$6.41
RT over DA
+$4.37
RT under DA
−$10.35
Prices

Live zone prices

Wholesale prices for every zone we track, updated through the day.

NYISOICAP

Open NYISO prices →
$/MWh
The record

Every call on the record

Every call is logged when it's made, hashed so it can't be rewritten, and graded against official settlements. One record per market.

ERCOT 4CP record

4 graded summers
every call
Peaks caughtDays flaggedFalse alerts
▲ WattMarkets15 of 1682134h
Alert every hot day16 of 16105178h

PJM 5CP record

every call
Peaks caughtDays flaggedFalse alerts
▲ WattMarkets18 of 203636h
Alert every hot day20 of 2086132h

NYISO ICAP record

every call
Peaks caughtDays flaggedFalse alerts
▲ WattMarkets3 of 42238h
Alert every hot day4 of 42546h

ISO-NE capacity tag record

every call
Peaks caughtDays flaggedFalse alerts
▲ WattMarkets3 of 366h
Alert every hot day3 of 31830h
See the track records
The delivery

Four sends a day, max

One WATCH the evening before. One WARNING by mid-morning. ACTION when it's time. STAND DOWN when it's over. Per market, only for the markets you follow.

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Everything here is free

The API key is free at sign-in. No card, no trial clock.

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