Previous day high/low as London scalp magnets — retest rules only

[LondonScalper]

PDH and PDL are magnets. Magnet does not mean market order at first touch.

I trade them as retest locations only after a clear reaction: sweep and reclaim, or break-and-retest with hold. Blind fades of first touch on previous day extremes have been inconsistent for me at London open, especially when the whole market is repositioning and the magnet is crowded.

Mark PDH/PDL before the session. If price never arrives, there is no FOMO trade elsewhere just because those levels exist on the chart. If price arrives in the middle of a data spike, the magnet waits — I do not need to be first.

I prefer prior day over random weekly levels for scalps; the magnet is closer to session memory.

Magnets attract stops as well as entries; that is why the reaction rule comes first.

• Retest only, or do first-touch fades of PDH/PDL work in your book?
• Prior day or prior session high/low for your scalps?

Levels need entry rules.

[Shadow Trader]

Retest only for me too, with one exception. If PDH gets touched in the last ten minutes before 08:00 on thin volume, I'll sometimes fade the first touch at small size, because there is no real London flow behind it yet. After 08:00 I go back to waiting for the reaction.

The attached chart is an illustration of the two cases I'll actually trade: a sweep above PDH that closes back inside on M5, and a break of PDL that retests from below and holds. Anything that just pokes the level and drifts, I leave alone.

img_12496.png (72.22 KiB) Viewed 56 times

On prior day versus prior session, I use both, but prior day wins when they're close together. If yesterday's London high and PDH are within 5 pips of each other, I treat them as one zone rather than two lines.

The crowding point is real. When PDH sits right next to a round number, I want the sweep to go at least 3 pips through before I believe the reclaim.

How long do you give the reclaim? I use two M5 closes, after that I stop calling it a sweep.

[Fairman]

I prefer prior day over random weekly levels for scalps

On prior day versus prior session, it's worth checking how your broker defines the day first. If the server runs on GMT midnight, you get a short Sunday candle from the open at around 22:00, so on Monday the platform's previous day high and low is that Sunday stub, a couple of hours of thin quotes, not Friday. Servers on GMT+2 or GMT+3, which line up with the 17:00 New York close, don't have that problem, which is one reason so many brokers use them. The same applies to any indicator that draws PDH and PDL automatically, since it reads the server's daily bars. For London scalps it can be cleaner to define the levels by clock yourself, New York close to New York close, and on Mondays use Friday's range. Then the levels match what most other people are watching.

[Shadow Trader]

Fairman's point about the Sunday stub is the Monday edge case I should have written into the card years ago. On a GMT midnight server the platform PDH on Monday is often that thin Sunday candle, not Friday's range, and fading or reclaiming it is trading noise.

I now mark Friday's New York close high and low by hand before Sunday open, and those are the magnets I use through Monday London. Platform PDH still shows, but it gets a different colour so I do not click it by habit.

I attached a synthetic Monday M5 chart as an illustration. Side A uses the Sunday stub as PDH and gets a false magnet a few pips under Friday. Side B uses Friday's NY close range, which is where the real stops sit.

img_12496_r2.png (70.14 KiB) Viewed 45 times

The two M5 reclaim rule still applies after 08:00. The only change is which line counts as the day level on Mondays.

LondonScalper, do you draw PDH by clock yourself, or trust the server daily bar? Fairman's GMT+2 or +3 note matches the brokers where my hand marks and the platform finally agree.

[Shadow Trader]

Many brokers cut the daily candle at 17:00 New York time, because that's when the forex "day" rolls. Settlement dates move, swaps apply, and liquidity is thin. That's 22:00 GMT or 23:00 WAT in winter, and 21:00 GMT or 22:00 WAT in summer.

Plenty of platforms use a server time of GMT+2 or GMT+3 that lines up so the New York close sits at server midnight. Others cut at midnight GMT, or at some other time altogether. The result is that the same pair can have a different daily high, low and close on different platforms.

A daily range of 62 pips on one chart might read 58 on another. Previous-day highs and lows move too, and so do pivot points built from them. A "sweep of yesterday's high" on one broker's chart might not exist on another.

For a scalper using the prior day's levels, that's worth knowing. The level isn't wrong, it's just defined by a convention that varies, so two people arguing about the same line may literally be looking at different numbers.

Where does your broker cut the daily candle, and have you ever had a previous-day level that only worked on one platform?

[FXS Prop Desk]

The Sunday stub is a classic trap, Fairman. Anyone using previous day levels should check their broker's server time zone once and note it in their trading plan. On GMT midnight servers, it may be worth calculating Friday's high and low manually for Monday sessions. That small adjustment avoids treating a few hours of thin Sunday quotes as a meaningful daily range.