Power trading
The wind forecast moves, and so does what you still have to sell. Calseda keeps each half-hour's open position and its value current the moment the forecast or a trade changes, and shows which data produced each figure.
A demo on Britain's real wind output and power prices. No sign-in.
What you can't see today
The open position is rebuilt from a spreadsheet when someone refreshes it, and drifts in between.
Screens that queue every price fall behind at the moment a trade matters most.
Power you have not sold settles at the imbalance price. Until settlement, nobody sees that exposure per half-hour.
Nobody can quickly say what a trade would do to the position and its limit.
What you'd see instead
The desk sets the day's position from the morning forecast.
The forecast rises for the evening. The position sheet still shows the morning's numbers.
Someone refreshes the sheet and finds 18:00 long by more than its limit. The 16:00 gate has closed.
The power left unsold settles at the imbalance price.
The forecast arrives. Every half-hour it touches is recalculated, and 18:00 goes over its limit.
The desk is told, with the forecast change that caused it.
A trader tries a sale for 18:00 privately, and sees the position back within its limit before booking it.
The trade is booked. The position and its value update at once.
An example with simulated data.
The open position for each half-hour ahead, worked out from the forecast and your trades, and recalculated when either changes.
When prices move faster than a screen can redraw, Calseda skips the values in between and sends the newest. Nothing builds a backlog.
A battery's schedule follows the same prices, and the position counts what it plans to charge or discharge.
Test a trade against the position and its limit before booking it. Only you see the answer.
Profit and loss since midnight, from settled output and system prices, as settlement data arrives.
See it in a demo
In a demo, a simulated 400 MW wind farm's open position is worked out for every half-hour of the next 24, from Britain's real wind figures and market prices, published by Elexon. Half-hours still open for trading are valued at intraday prices, the rest at the market index price. A battery's schedule follows the same prices.
Use it yourself, no sign-in: A wind portfolio's open position, half-hour by half-hour ↗ · A private what-if trade ↗
What changes for your desk
When a forecast moves the position, you see it while the half-hour is still open for trading.
What settles at the imbalance price is what you chose to leave open, with current figures in front of you.
Calseda is not your trade capture system or your settlement ledger. It reads from them, and keeps the live figures built on them.
How it starts
For example, one wind farm, or one battery with the trades against it.
Your trading system, for example Trayport or Endur, sends each trade as it is booked, over Kafka or a REST call. Market data comes the same way, from the sources you already pay for.
Your developers, or ours, write the position calculation. Calseda does the rest.
It runs alongside today's position sheet, so your desk can compare the two before relying on it.
Become a design partner: a pilot on generous terms, in exchange for a case study published only with your approval.
For your colleagues: Power trading, one page (PDF) and the executive briefing, 10 slides (PDF).