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Costco slips 1.4% as sellers retake control

Costco stays under watch in the 13th week of its sell signal: this week sellers regained control of volume and the stock gave back 1.4%, while the trend keeps losing strength and price stays pinned between two key levels.

Costco slips 1.4% as sellers retake control
Sell signal, week 13

Costco slips 1.4% as sellers retake control

August 21, 2026

Our view last week

Costco's Sell signal has been under management for 11 weeks, and this week changed rhythm: buyers took 86% of volume, up from just 38% seven days ago. The stock gained 1.4% and on the daily chart bounced 3% off its own 20-day moving average, in the 950 area, after touching the 935 area. The trend is losing conviction — ADX is falling — while price stays boxed into a tight corridor between the 960 and 962 areas.

This week's summary

After a week of dominant buyers, sellers took back control of Costco: 58% of volume, and the stock gave back 1.4%. The ADX keeps falling for a fourth straight week, a sign the trend keeps losing conviction, while price stays pinned between the 950 area and the 945 area, with the distribution phase flagged by the price action still in place.
Ongoing decline ·13th week from start ·US stocks ·T2 ★ See Gold version →
IQS Phase
65
in tension
Signal Strength
20
decline starting to make lower lows
Sizing
MINIMUM
Ranking
#55 / 93
US stocks
Trade P&L %
+0.90%
from signal to date, no stop loss

Chart · Weekly — EMA50 · MACD · VWAP

Weekly chart · EMA50 · MACD · VWAP · Source: TradingView
How to read this pageA visual guide to the post, card by card

Rank position

ranks 55th among the 93 sell signals for US stocks in our ranking, with a signal strength of 20 out of 100.

Sector context

SectorConsumer Discretionary
Benchmark ETFXLY
Sector regimein strong phase
Performanceweekly -0.15% · monthly +3.51%

COST belongs to the consumer discretionary sector (reference ETF XLY). The sector is classified in strong phase according to our weekly reading.

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