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Finding Range Boundaries From Raw Candle Data

Here are the highs and closes of eight consecutive hourly candles on USD/CAD. Highs: 1.3540, 1.3552, 1.3548, 1.3538, 1.3551, 1.3545, 1.3550, 1.3542. Closes: 1.3532, 1.3541, 1.3536, 1.3530, 1.3539, 1.3534, 1.3538, 1.3531.

Where is the resistance? Do not pick one number. List the highs: they cluster between 1.3538 and 1.3552. Four of the eight highs sit within 1.3548 to 1.3552. The closes, meanwhile, cap near 1.3541.

So the evidence points to a zone, not a line. A reasonable zone runs from about 1.3540, where bodies stop, to 1.3552, the highest wick. Its width is 12 pips.

What does the zone width tell you? First, an order placed exactly at 1.3552 would have been touched only twice, while an order anywhere in the zone would have been tested often. Second, a stop placed just above 1.3552 sits at the very edge of the wicks, where a fresh push could reach it. Third, a stop 8 to 10 pips above, past the wick cluster, has more room.

Compare with a hand-drawn line at 1.3545. Price crossed it six times without any meaning, which is why traders who treat the line as a wall get frustrated.

The skill is to let the data suggest a boundary range, and to size your stop to the zone.

Exercise: take eight candles from your own chart and compute the zone from highs and closes.

Treating it as a zone makes sense. One thing to add: whether the chart is bid-based matters. Most platforms plot bid prices, so the wick highs are bid highs, and a buy stop or a short limit executes on the ask, which is a spread higher. With a 1.5 to 2 pip spread on USDCAD in quiet hours, a short limit at 1.3550 on the chart might fill only when the bid reaches 1.3548 or so, depending on the platform.

For range trading on hourly candles that's a small detail, but for scalping the same boundaries on M5 it can be the difference between a fill and a miss.

The zone approach is the right way to read this data. Four of the eight highs fall between 1.3548 and 1.3552, and the closes cap near 1.3541, so the selling pressure appears across a 12 pip band rather than at one price. One small refinement: only one candle actually reached 1.3552, with another at 1.3551, so an order at exactly 1.3552 would have been touched once, not twice. That reinforces the post's point. Precise levels are hit far less often than zones, which is why entries and stops planned around a single line tend to disappoint.

The distinction between bodies and wicks is useful. Closes capping at 1.3541 show where sellers were consistently in control by the end of each hour. Wicks up to 1.3552 show where buyers pushed temporarily but couldn't hold. A short entry near the top of the body zone, around 1.3540, with a stop beyond the wick zone, gives a logical structure. Some traders enter only after a rejection candle closes back inside the body zone, which adds confirmation at the cost of a slightly worse entry. Either way, the zone defines both the entry area and the stop placement.

When I started trading ranges I drew single lines at the obvious highs, and my stops sat just above them, so I got swept almost every second trade. What changed it for me was exactly this kind of exercise, but done on about forty hourly candles of EURCHF, where the wick highs spread across roughly 9 pips while the closes stacked within about 3.

I now mark two edges, the level where bodies stop and the highest wick, and I treat the space between them as the zone. My entry goes near the body edge and the stop goes about half the zone width beyond the highest wick. On that pair it meant a stop around 6 pips past the wicks instead of 1 or 2, and the number of stop outs from simple probes dropped from about half my trades to around a third.

I also keep in mind that the platform draws bid candles, so a short limit near the top of the zone needs a spread allowance to actually fill.

The stop placement comparison is the practical heart of the exercise. A stop just above 1.3552 sits exactly where the next push would reach if buyers try one more time. A stop 8 to 10 pips beyond gives room for a final probe without invalidating the zone. On USD/CAD, where the hourly range might be 15 to 20 pips, an 8 pip buffer is a reasonable share of normal movement. Tying the buffer to the hourly ATR, as discussed in the buffer thread, would make the choice consistent across different volatility conditions.

Repeating the exercise on your own charts, as suggested, builds the habit of seeing zones rather than lines. Many traders find their hand drawn lines were placed by eye at a visually satisfying point that didn't match where price actually reacted. Computing the zone from the data removes that bias. Has anyone here switched from lines to zones for support and resistance? I'd be interested in whether it changed your stop placement and whether you noticed fewer stop outs just beyond the level you had drawn. Zones also make it easier to explain a setup to someone else.