CwO index: the index's opening price of the week
CwO index stands for current week open, index: the official opening price of the index — for example the S&P 500 or the DAX — on the first trading day of the week. It is the price where the week of the stock market started, and price often comes back to test it. Basics draws the line on the index and CFDs as it is, and converts it to the right price on futures charts. It is switched off by default; this page explains what it shows and how to switch it on.
On this page
12345
- 1Monday 28 September, 09:30 — the official S&P 500 opening price is 7,721.70: CwO index for the whole week. The index falls 55 points in the first hour.
- 2Monday 12:00 — back at the line: 7,724.15, then down again.
- 3Wednesday 30 September — three attempts at the line: 7,721.39 at 10:00, 7,722.88 at 10:30 and 7,721.25 at 11:30.
- 4Wednesday 15:30 — 70 points lower: 7,652.90.
- 5Thursday 11:00 — the low of the week: 7,616.78.
Part of Basics
Free TradingView indicator with all session, week and month levels for index, futures and CFD charts.
Install Basics (free) →What the index's opening price of the week is
An index is only calculated while its stock market is open. Its official opening price is the first value the index provider publishes each day, calculated from the opening trades of the stocks in the index. CwO index takes that price on the first trading day of the week — normally Monday:
| US indices (S&P 500, Nasdaq-100, Dow, Russell 2000) | Monday, shortly after 09:30 New York time |
|---|---|
| DAX | Monday, shortly after 09:00 Berlin time |
For the other markets Basics uses the opening of that stock market. If the market is closed on Monday, the first day that does trade counts.
The index's weekly open or the future's?
Index futures start their trading week earlier: ES on Sunday evening, FDAX on Monday morning before the stock market. Their first price of the week is a different level: CwO future. On top of that, a future trades at a premium or discount to its index — the cash-future difference. CwO index shows where the week of the stock market itself started.
Why traders watch it
- Above or below the open. Whether the index is above or below this week's opening price is a quick read of who is in control this week.
- A level price comes back to. After a move away, the week's open often stops price on the way back — from above as support, from below as resistance, as on Wednesday in the example.
- Not a wall. When price crosses it and stays on the other side, the week has turned; the line then often works the other way round.
How Basics shows it
CwO index is drawn on every supported chart. On the index and on CFDs it is the opening price itself; on futures (main, mini, micro, nano) it is converted with the current cash-future difference. The line starts at the candle that contains the opening — on a 1-hour chart of a US market the 09:00 candle, which contains 09:30 — and runs through the rest of the week. On the first trading day of the week it is the same price as RTH O index; with both lines switched on, Basics draws one line with the label RTH O/CwO index.
| Default look | Dark green, solid, width 2 |
|---|---|
| Label on the chart | CwO index (renamable) |
| Switched on by default | No |
| Value | The official opening price of the index on the week's first trading day |
| Price on your chart | Futures (main, mini, micro, nano): converted with the current cash-future difference. CFD and index charts: the index value itself |
| Where the line starts | At the candle that contains the official opening; it runs through the rest of the week |
| Timeframes | Charts from 1 minute up to the daily chart, on seconds charts too, unless the level needs more history than the chart loads; not on weekly or monthly charts |
| Markets | Nasdaq-100, S&P 500, Dow, Russell 2000, DAX, FTSE 100 and AEX — all tickers |
| Lookback | 1 — this week only (up to 20 weeks) |
The same line on a futures chart
Click the chart to enlarge it.
Why don't I see the line?
- It is switched off.CwO index is off by default. Check the box under Index levels and the master switch Show all objects in 'Index levels' group in the indicator settings.
- The stock market has not opened yet this week.Before the first official opening price of the week there is no line.
- You are on a timeframe without it.The line is drawn on charts from 1 minute up to the daily chart.
- Price is far away from it.Lines are hidden while the level is more than 5 % from the current price, so they don't squeeze the chart. You can change this under General → Level visibility range.
- Your ticker is not recognised.See the supported tickers — and if yours is missing, let me know: requests are very welcome.
What you can change
In the indicator settings (the gear icon next to Basics on your chart), under Index levels:
| Show / hide | CwO index checkbox · Index levels |
|---|---|
| Colour, width, style | Any colour · width 1–5 · solid, dashed or dotted |
| Label text | Default CwO index |
| Lookback | 1–20 weeks (default 1: this week only) |
| Label size, line end, visibility range | Shared with all lines · General |
Charts and defaults on this page: Basics v11.72.8 · updated 21 October 2026.
Frequently asked questions
When is the index's week open set?
At the official opening of the stock market on the first trading day of the week: shortly after 09:30 New York time for the US indices, shortly after 09:00 Berlin time for the DAX.
What is the difference between CwO index and CwO future?
CwO index is the official opening price of the index on Monday. CwO future is the future's first price of its trading week, which starts earlier — on Sunday evening for ES. See the index's weekly open or the future's.
Why does the label say RTH O/CwO index on Monday?
On the first trading day of the week the official opening price is both today's (RTH O index) and the week's (CwO index). With both lines switched on, Basics draws one line with both names.
Does it work on a futures chart?
Yes. On ES, MES, FDAX or FDXM the opening price is converted with the current cash-future difference.
Does it work on a CFD?
Yes. On a CFD such as US500 or GER40 the line is the index's opening price itself.
Related levels
See the week's open on your own chart
Basics is free on TradingView. Add it to any supported chart — for example the S&P 500, ES or GER40 — and switch on CwO index under Index levels.