HOW TO USE ADR TO SET YOUR STOP LOSS.

A tighter stop is the cheapest way to make your winners bigger.

Fix the dollars you risk and halve the distance to the stop, and you hold twice the shares. So the same move pays twice the R. The half-ADR stop puts a limit on how far that stop can sit: never more than half the stock's average daily range below your entry.

The catch is that a stop that tight sits inside the stock's normal daily swing, so you'll get shaken out of some trades that would have worked. Whether that's worth it depends on your entries and your stocks, not on the rule.

Where the half-ADR rule comes from

Traders who use it typically risk 0.5–1% of the account per trade, with stops that are mostly 1–5% wide. The hard limit is that a stop is never wider than half the stock's average daily range, so at most 2.5% on a stock with a 5% ADR.

It's the tight end of a family of similar rules. Kristjan Kullamägi (Qullamaggie) puts the stop at the low of the entry day and won't take a breakout where that low is more than one ADR away. Another version passes on a trade when the low of the day is already more than 60% of the stock's average true range from the entry.

All three measure the stop against the stock's own daily movement rather than a fixed percentage, and that's the point. A 2% stop is wide on a sleepy stock and inside the noise on a fast one.

If ADR is new to you, start with ADR%: the one volatility number every swing trader needs. In short, it's the average of each day's high ÷ low − 1 over 20 sessions.

How to work it out

It takes three steps, and you can do them before the stock ever reaches your entry.

Find the ADR. Take the stock's average daily range as a percentage, over the last 20 sessions. Halve it. That's the widest your stop is allowed to be.

Find the deepest allowed stop. Take your entry price and subtract that half-ADR distance. A stop anywhere below this line breaks the rule.

Compare it with the low of the day. At the moment you buy, look at where the day's low stands. If it's above the half-ADR line, the low of the day is your stop, and the cap doesn't change anything. If it's below the line, the cap pulls your stop up to the line, inside the day's range.

So the stop is always whichever of the two is closer to your entry. And if the day's low is more than a full ADR below the entry, the low-of-day rule says skip the trade rather than tighten it.

Low of day or half an ADR?

The low of the day is a natural level. If the stock trades back under it, the breakout has clearly failed. A stop at half an ADR is a choice about how much room you give the trade, and that's what makes it both cheaper and riskier.

When the low is already within half an ADR, there's no decision to make. The two rules agree.

When the low is between half an ADR and one ADR away, the cap matters. That usually happens when the stock opened near its low and climbed for hours before it reached the top of the base. The capped stop is tighter and the position is bigger, but now the stop sits where an ordinary afternoon dip can reach it.

When the low is more than one ADR away, the low-of-day rule skips the trade. Tightening the stop there just means placing it in the middle of a very wide day.

The cap tends to suit precise entries: you bought right at the trigger, the stock had been tight going in, and it's moving cleanly through the level. It suits you less when you're buying late after a big run in the day, or the stock is swinging wildly around the breakout, because then the day's range is the noise you'd be sitting in.

The real test is your own winners. Pull up the MAE of your winning breakouts, meaning how far each one went against you before it worked, measured in ADRs. If almost none of them dipped more than half an ADR, the cap is buying you bigger winners for few real shakeouts. If many did, it'll cut exactly the trades you need.

What it does to your position size

The maths of why a tighter stop makes winners bigger is simple, and we covered it in why a tighter stop can mean far more upside. Halve the stop, double the shares, and the same move pays twice the R. On a 25% move, going from a 3% stop to a 1.5% stop turns about 8.3R into about 16.7R.

Your dollar risk doesn't change, so a full loss still costs one unit. What changes is how much stock you hold and how much a winner pays.

That has three side effects.

Concentration. At 0.5% risk, a 1% stop needs a position worth half the account. Qullamaggie never holds more than 30% of his account in one name overnight, and a tight enough stop will run into that limit on almost every trade. When it does, the position limit wins and you take the smaller size.

Slippage. Every cent you lose on the fill is a bigger slice of a small risk, so it costs more R. On a thinly traded stock, that can eat much of what the tighter stop was meant to buy.

Losing streaks. A tighter stop gets hit more often, so the win rate falls and the runs of losers get longer. Your risk per trade has to be small enough that a long run of full losses doesn't change how you trade.

Where tight stops break down

Three things make a tight stop worse than the arithmetic suggests.

The first is slippage, as above. The smaller the risk, the more each cent on the fill costs you in R.

The second is timing on the entry day. A stop that's tighter than the day's low can be hit in the hours after you buy, and whether it is often comes down to the order of a few intraday swings rather than anything about the trade. A breakout can give back its morning gain, tag a tight stop and still close the day above your entry.

The third is discipline. A tight stop only works if you sell when it's hit. Hesitating turns a one-unit loss into two or three, which wipes out the asymmetry you tightened the stop to get. (Qullamaggie's habit of buying a stock back when it stops him out and then retakes the highs is one way tight-stop traders win some of those shakeouts back.)

A stop that held through a dip: ZBRA, July 2026

Zebra Technologies (ZBRA) built a base of about seven weeks before it broke through the top late in July 2026. By the time it got there, the day's low was only just over half an ADR below the entry, so the cap nudged the stop up a little and no more.

The next day it slipped back under the entry, about a third of an ADR, which left a little room above the stop. The day after that it gapped up hard. A third went at the close on day 3 and the rest rode the 21 EMA until the first close below it at the start of September, for +10.2R (against +9.3R with the stop at the low of the day).

Cutting the risk by a third: CASY, March 2026

Casey's (CASY) broke out of a base of about three weeks at the end of March 2026. It opened right at its low and climbed through the top of the base later in the day, so by the time it triggered, the day's low sat about three quarters of an ADR below the entry. The half-ADR cap pulled the stop up and cut the risk per share by about a third.

It dipped about a tenth of an ADR under the entry that afternoon and never traded below it again. A third went on day 3 and the rest on the first close below the 21 EMA in late May, for +6.8R. The same exits with the stop at the low of the day made +4.6R, so the whole difference came from the stop.

Half the stop, almost twice the R: NTRA, November 2025

Natera (NTRA) broke out of a two-week base in November 2025. Like CASY, it opened near its low and rallied through the top of the base around midday. That left the day's low almost a full ADR below the entry, right at the edge of what the low-of-day rule allows.

The half-ADR cap roughly halved the stop.

Once it was through, it hardly looked back. It barely dipped under the entry for the rest of the day, and never went below it after that. A third went on day 3 and the rest on the first close below the 21 EMA in mid-December, for +3.9R, against +2.1R with the low-of-day stop.

A stop it never came near: SWKS, September 2026

Skyworks (SWKS) spent about eight weeks basing before it broke out in September 2026. It went through the top of the base early in the session, on a day that ended up far wider than its usual range. At the moment of entry, the day's low was only a little more than half an ADR away, so the cap moved the stop up just a touch.

It closed the day well above the entry and never returned to it, not even on a sharp red day a couple of sessions later. A third went on day 3 and the rest on the first close below the 21 EMA at the start of October, for +5.4R (+4.7R with the low-of-day stop).

What the four have in common

In every one, the stock moved cleanly away from the entry and didn't come back much. ZBRA came closest, and it still stayed more than a tenth of an ADR above the stop.

That's the kind of trade the cap pays on. The tighter the stop, the more it pays when the breakout works straight away, and the bigger the gap between the low of the day and the half-ADR line, the bigger the boost. NTRA's was the widest, so its R nearly doubled. On ZBRA and SWKS the cap barely moved the stop and barely changed the result.

What these charts can't show you is the other side: the breakouts that dipped through half an ADR, stopped you out, and then went on without you. Winners-only examples always flatter a tight stop, so judge it on your own trades, including the ones that stopped you out.

How to pick your own stop width

1. Start with the low of the day as it stands when you buy, and skip the trade if that's more than one ADR away. It's the natural level, and it doesn't depend on what happens inside the entry hour.
2. Tighten towards ½ ADR only on evidence. Check the MAE of your winning breakouts in ADRs. If almost none of them dipped more than half an ADR, the cap should cost you few winners. If many did, leave the stop at the low of the day.
3. Treat anything much tighter than ½ ADR as a different strategy. At that point the outcome depends on the first hour. That can work for traders with precise intraday entries who re-enter readily, but it's a day-trading skill bolted onto a swing setup.
4. Size for the streak you'll get. If you tighten the stop, expect a lower win rate and longer losing streaks. Make sure your risk per trade is small enough that twenty or thirty losses in a row doesn't change how you trade.