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COST Cup with Handle Base Forms as Stage 4 Downtrend Weighs

Posted on by Eben@CANSLIM Research
COST daily stock chart with 10, 20, 50, 150 and 200-day moving averages, volume and RS line versus SPY, Stage 4 (Declining), as of September 21, 2026 at 00:06 — CANSLIM Research
Eben@CANSLIM Research's avatarEben@CANSLIM Research

Costco (COST) is trading at 895.31 and has carved out a 17-week Cup with Handle base with a pivot at 971.40, yet the broader structure remains under pressure. The stock sits in a Stage 4 decline below a falling 30-week moving average, with only 3 of 8 trend template checks passing and price 18.1 percent off its 52-week high. Sentiment is cautious and deteriorating, so the market is focused on whether this base can hold or resolve into a breakdown.

Technical Analysis

As of 2026-09-18 · Close $895.31

Stage Analysis

Stage 4 (Declining) — Price below a declining 30-week MA — downtrend (30-week MA 6-week slope: -1.03%)

Detected Patterns — What the Market Is Watching

  • Cup with Handle — depth 18.2%, length 17 weeks, pivot $971.4. Base formed from 2026-05-19 (left-side high) to 2026-08-24, with the low of $893.74 set on 2026-09-16
  • Handle: formed from 2026-08-24 (high $971.4) to 2026-09-16 (low $893.74) — a 8.0% pullback

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