ICT Kill Zones and Session High LowICT Kill Zones and Session High Low
What it does
This indicator draws the intraday sessions as boxes with their high and low, marks the three daily opening levels, and reports which time state the chart is currently in. Its point is not the feature list, which you can find elsewhere; its point is being right at the edges. Everything is anchored to New York wall-clock time, so the sessions keep their place through every daylight-saving changeover, including the weeks when the United States and Europe have not both switched yet. On those weeks the panel says so.
How it works
Every window is resolved through the named time zone America/New York rather than a fixed offset, the chart time zone or your local time. That single choice is what makes the boxes sit correctly in March and October, and it is the reason a session cannot drift by an hour without anyone noticing.
A session starts on the first bar that falls inside its window, not on a bar whose clock reads exactly the start time. On a 45 minute chart no bar lands on 07:00, and a script that waits for one draws nothing that day.
While a session runs, its box grows and its high and low move with it. That state is drawn with a dashed border, because a level that can still change must not look like one that cannot.
When the session ends, the high and low are fixed and never move again. The border turns solid and the two levels extend to the right.
The bar that ends a session can already trade through what that session just fixed, so both things are allowed to happen on the same bar. A level that was taken immediately is never shown as untouched first.
A level is taken when price trades strictly beyond it, by wick or by close depending on the setting. A value exactly on the level is not a take, and each level changes state only once.
The New York to London offset is recalculated per trading day from the calendar itself. It is displayed, never applied: the sessions sit right because they are anchored to New York, not because anything is shifted.
Short trading days and holidays are read from the bars that exist, not from a stored calendar that would need maintenance and would eventually be wrong.
How to use it
Add the script to an intraday chart. Sessions cannot be resolved above 60 minutes, and on higher timeframes the script says so instead of drawing something misleading.
Read the dashed box as the session in progress and the solid one as finished. The two lines running to the right are the finished session's high and low.
Watch the panel in March and late October. When it reads 4h instead of 5h, the two regions are out of step and the London session sits an hour away from where it was the week before. The gap can last up to three weeks in spring and about a week in autumn, depending on the year.
If a day reads Early close or No RTH session, that day was short or closed. Both are recognised after the day is over, so the label refers to the last completed day.
Inputs
Sessions group - one row per session with a switch, its start and end time in New York wall-clock time, and its colour. London Close is off by default so the standard chart shows four boxes that do not overlap.
Session Levels group - show the fixed high and low, extend them to the right, and choose whether a wick or a close counts as taking them.
Time Markers group - Midnight Open, True Day Open and RTH Open, each switchable. The last two are hidden automatically where they have no meaning. Extend Markers Right lets the newest marker of each type run past the latest candle so its line and label stay visible in front of the price action; range 0-500, default 10. Older markers still end where the next marker of the same type begins.
Level Line Style and Marker Line Style - solid, dashed or dotted. The markers are dotted by default so they read as references rather than as structure.
Label Background - off by default, so only the label text shows. Turn it on where a label sits over the candles and the bare text is hard to read.
Days Retained - how many trading days stay drawn, the current one included. Range 1-10, default 2. Older days are deleted, not hidden. On futures the Sunday evening open counts as its own day, so on a Monday the default keeps Sunday and Monday rather than Friday and Monday.
Display group - session labels and where they sit: Above Box by default, Inside Box or Below Box, always centred on the width of the box. Plus text size in points, the time state panel and its corner.
Style group - how far the boxes fade for finished and running sessions, line widths, and one colour per time marker.
Alerts group - each of the four alert conditions can be switched off.
Signals and alerts
Session opened - fires on the first closed bar of a tracked session. Off by default, because the clock is not news.
Session closed - fires when a session has ended and its levels are fixed. Off by default for the same reason.
Session high taken and Session low taken - fire when price trades through a fixed level. On by default, because this is the one event of the four that is not predictable from a clock.
All four fire on the close of the bar that produced the change, and each level can only be taken once.
Repainting
Sessions start, end and levels are taken only on closed bars. A running session is the one thing that changes while it runs, and that is its purpose rather than a defect: its box grows with each bar and is drawn with a dashed border to say so. Once a session is finished its box and its two levels are fixed and are never rewritten, and the offset shown in the panel changes nothing that is already on the chart.
Limitations
A short trading day or a holiday is recognised only after the day is over, because it is read from the bars that exist rather than from a stored calendar. The panel therefore reports the last completed day. On futures that means a short Friday is reported during the Sunday evening session and is replaced once Monday begins.
Sessions need an intraday timeframe. Above 60 minutes the windows cannot be resolved and nothing is drawn.
On instruments without a regular trading session - spot forex, crypto and CFDs - the True Day Open and RTH Open markers are hidden because they are not defined there. The panel says so.
Only the most recent day's time markers carry a label. Older ones keep their line but would otherwise stack their labels on the same spot at the right edge.
A session with no bars inside its window produces nothing at all, which is correct but means an empty session leaves no trace to explain itself.
Days Retained set to 1 together with a window you moved across midnight keeps only the session that is still running. Its completed form is never shown, because the day it belongs to is already outside the retention. Raise Days Retained to 2 if you want to see it finished.
Only the bars of the chart timeframe are used. There is no higher timeframe layer, no intrabar data and no volume.
The script describes when things happened and whether a level was traded through. It does not compare sessions, rank them, or suggest entries, exits or targets.
This script is a charting tool for educational purposes. It does not provide financial advice and does not predict future price movement. Trading carries risk; decisions and their outcome remain yours.
インジケーター
