Change of Character vs Support and Resistance
Michael Whitman
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Trading since 2017, full-time since 2020
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Published 2026-09-09
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Updated
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Reviewed
A change of character is a single close past the newest swing point, against the trend, so it is an event that says the sequence broke. Support and resistance is a price where the market has turned before, a level with no view on the trend. The two meet at the broken level.
This pair meets at one price, because a change of character is defined by the level it breaks. The common teaching says that broken level now acts the other way: old support becomes resistance. On SPY’s daily chart the level almost always came back into play, and it held about as often as it failed.
What each one is
A support or resistance level is a price the market turned at before. Its claim is that many traders watch the same price. Support and resistance covers how such levels get marked.
A change of character is the sequence breaking the other way. With price rising, it is the first daily close under the newest five-bar swing low. Change of character covers the rule, and break of structure covers its with-trend twin.
So the level is a location and the change is an event. Whereas a level can be watched for months, a change of character happens on one close and is then over, rather than lasting while either side tests it.
Where they differ
What each says about direction. A level says nothing about the trend; price can reach it from either side. A change of character is only about the trend, and names no price except the one it broke.
Who sees it. A daily level near an old turn is public, while a swing count depends on the rule you use, so two traders can disagree about whether a change of character happened.
What each is for. A level is where an order rests. A change of character is a reason to stop acting in the old direction, which first concerns positions already open.
How each is confirmed. A level gains standing with each test, whereas a change of character has no later confirmation of its own; it is followed either by a break the same way or a break back.
Which one to use: Change of Character or Support and Resistance?
Use support and resistance to choose the price. It can carry an order and a measured stop, and other traders are acting there too.
Use a change of character to decide when to stop leaning on the old trend. Its honest use is defensive: take profit, tighten risk or stand aside.
Use the broken level as a place to watch, not a place to fade, when price returns. On SPY the return came after nearly nine in ten changes of character, and the close held on about half.
And when a downward change of character breaks a swing low, plan for a quick revisit. Those levels came back within 20 sessions after 105 of 110 breaks.
Does the broken level flip? SPY, 1993 to 2026
The test. For each of SPY’s 220 changes of character, the broken swing level was watched for the next 20 sessions. A return is the first of those sessions to trade back to the level (down to an old high that was broken, up to an old low), compared with the unrounded level so a touch exactly at it counts. It held if that session closed back on the break side, a close exactly on the level counting as held.
The level came back almost every time. After upward changes of character (old resistance now meant to be support), price returned in 91 of 110 (82.73%); after downward ones (old support now meant to be resistance), in 105 of 110 (95.45%). Across all 220 the return came in 196 (89.09%), and in 101 cases it came the very next session.
It held about half the time. Upward: 53 of 91 returns held (58.24%). Downward: 46 of 105 (43.81%). All: 99 of 196 (50.51%).
Against breaks of structure. The break of structure versus support and resistance page ran the same test on with-trend breaks. Swing lows broken by a change of character were revisited more often than swing lows broken by a downward break of structure (Fisher exact test, p = 0.035). Every other gap, for returning upward and for holding either way, was within chance (p from 0.29 to 0.58).
A flip that failed: SPY, October to November 2025
A failed flip: October and November 2025. On 24 October 2025 SPY closed at $677.25, above the 10 October swing high of $673.95, an upward change of character after a downward read. Nine sessions later, on 6 November, the low reached $668.72 and the close was $670.31, back below the level. The old resistance did not hold as support on its first test.
The original data
The sample. Highs, lows and closes from Yahoo Finance for SPY, every trading day from late January 1993 until 2 October 2026. The swing code here returns the same event list as the break of structure page; every one of the 220 changes of character, the last on 1 September 2026, has 20 sessions after it.
The rule. Any high above the five highs before and after it is a swing, usable only once those five later bars exist; the newest swing is the live one, and one close past it uses it up. A break against the latest read is a change of character. Returns and holds are as described above, with Fisher exact tests against the breaks of structure. Of the 220, the level came back the very next day 101 times, 45.91% of them.
What is not measured. Nothing here follows price after the return session, so a hold is not shown to lead anywhere. The comparison is within one fund’s history, and returns cluster in time, so the p values are optimistic. Every break, its level, its return and the close that day sit in the SPY broken swing level file.
When it fails
The failure is selling the first return to a swing low that a change of character broke, as if the old support were now reliable resistance. On SPY that return came after 105 of 110 downward changes of character, and the close held below the level on fewer than half. A trader fading every return is taking the trade at a level that gave way about as often as it held, with a stop that sits right where the market tends to trade.
A second failure is reversing on the change of character itself. No later break has backed it yet.
A third is relabeling swing points after the fact so that a break qualifies.
A fourth is placing a stop a few cents past the broken level. The return reached the level on 101 of 220 occasions the very next session.
And a fifth is treating a level as stronger for having been tested many times. Each test is a fresh question.
Related
Change of character covers the five-bar rule behind these counts. Support and resistance covers marking a level from past turns. And break of structure covers the with-trend break, whose own retest record is on the comparison page linked above.
Expect the level a change of character breaks to be revisited, usually within days, and plan for it. A return to the level is the normal case, so it is not a reason to abandon the read, and a close back through it is roughly as likely as a hold.
— Michael Whitman
This page is educational, not financial advice. Test every idea on your own charts before risking money.