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Archive
- 9/4/2026 -
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Costco Co. (COST) Technical Analysis
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| Summary:
| | Weekly :  | | Daily :
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| | It was the negative week for the Costco Co. (COST). During the week, the COST dropped -29.73 points, or -3.14%, and closed at 915.74 on Friday, September 4, 2026. It was the worst weekly loss since July 10, 2026. Weekly volume was -10% below average.
 Long-term trend: [See COST long-term trend chart]
A long-term downtrend had started on May 19, 2026 at 1096.50 and reached 907.21 on July 10, 2026. COST lost 189.29 points, or 17.26%, in 7 weeks. Price is near the trend low.
 Medium-term trend: [See COST medium-term trend chart]
A medium-term uptrend had started on July 10, 2026 at 907.21 and reached 987.55 on July 28, 2026. COST gained -80.34 points, or -8.86%, in 2 weeks. The chart has formed a Symmetric Triangle chart pattern. The uptrend support line (955.63) is broken. Usually a broken support is considered to be a long-term bearish signal, but since daily indicators are oversold a short-term pull back is possible. COST may retest the broken support line. It is considered to be a resistance line now. Use the following links to access Trend Support/Resistance Help, or use the Technical Stock Screener to see the list of stocks with broken trend support in a medium-term trend.
 Weekly Technical Indicators: [See COST weekly technical indicators chart]
Weekly Williams' Percentage Range is oversold. Use the Technical Stock Screener to see the list of stocks with weekly oversold Williams' Percentage Range. Oscillators are designed to signal a possible trend reversal. They can act as alerts and should be taken in conjunction with other technical analysis tools. Oscillators can be used to confirm other technical signals. Use the following link to access Williams' Percentage Range help.
The weekly MACD line is below its signal line since May 29, 2026. Use the following link to access a MACD help.
Short-term trend: [See COST short-term trend chart]
A short-term downtrend had started on August 19, 2026 at 978.70 and reached 914.54 on September 4, 2026. COST lost 64.16 points, or 6.56%, in 16 days. Price is near the trend low.
 Daily Technical Indicators: [See COST daily technical indicators chart]
Daily Williams' Percentage Range and Lane's Stochastic are oversold. Use the Technical Stock Screener to see the list of stocks with daily oversold Williams' Percentage Range and Lane's Stochastic. Use the following link to access Lane's Stochastic help.
The daily MACD line is below its signal line since August 26, 2026. This is an indication that the short-term trend is down.
During the last week, the price has fallen below the Parabolic SAR (stop and reversal). A Parabolic SAR above the price is a bearish signal, and it indicates that momentum is likely to remain in the downward direction. A Parabolic SAR is used as a trailing stop loss for long or short positions. It works best during strong trending periods. Use the following links to access Parabolic SAR Help, or use the Technical Stock Screener to see the list of stocks with the Parabolic SAR close to the price level.
The price touches the lower Bollinger Band. The Bollinger Bands are often used with a non-oscillator indicator like chart patterns or a trendline. The signals are considered more reliable if these indicators confirm the recommendation of the Bollinger Bands. Use the following links to access the Bollinger Bands Help, or use the Technical Stock Screener to see the list of stocks with the price above the Upper Bollinger Band or below the Lower Bollinger Band.
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