Costco WholesaleCOST
Auto-detected technical analysis for COST · data as of Sep 1, 2026. The chart above is live; the read below updates daily.
COST is currently forming a falling wedge on the daily timeframe. Detected Sep 1, 2026.
A falling wedge is a brief, tidy pause that typically continues the move higher. A breakout projects a measured-move target near $985.10 (+5.5%).
New to this pattern? What a falling wedge is and how to trade it →
COST's most recent completed falling wedge (which broke against type) resolved as a loss: it broke down on Sep 21, 2026 near $888.27, then was stopped out at $921.99 on Sep 25, 2026 — a 3.8% move (-1.00R) over 4 sessions. Across 137,198 backtested falling wedges, this setup wins 42.2% of the time.
Every completed pattern trade our nightly backtest found on COST's daily chart, newest first — wins and losses alike.
| Pattern | Entry | Exit | Outcome | Result |
|---|---|---|---|---|
| Falling wedge | Sep 21, 2026 @ $888.27 | Sep 25, 2026 @ $921.99 | Loss | +7.0% · -1.00R |
| Triangle | Aug 27, 2026 @ $944.37 | Oct 14, 2026 @ $978.70 | Loss | +6.8% · -1.00R |
| Triangle | Aug 20, 2026 @ $931.06 | Oct 14, 2026 @ $978.70 | Loss | +5.5% · -1.00R |
| Triangle | Aug 19, 2026 @ $978.07 | Aug 21, 2026 @ $939.64 | Loss | +4.8% · -1.34R |
| Falling wedge | Aug 18, 2026 @ $966.11 | Aug 21, 2026 @ $939.64 | Loss | +14.3% · -1.59R |
| Falling wedge | Jul 27, 2026 @ $950.38 | Sep 8, 2026 @ $912.40 | Loss | +5.2% · -1.13R |
| Falling wedge | Jul 27, 2026 @ $953.46 | Sep 8, 2026 @ $912.40 | Loss | +14.4% · -1.12R |
| Falling wedge | Jul 24, 2026 @ $935.20 | Aug 5, 2026 @ $956.99 | Win | +3.5% · +1.18R |
| Falling wedge | Jul 17, 2026 @ $961.52 | Aug 5, 2026 @ $956.99 | Loss | +4.4% · -0.09R |
| Falling wedge | Jul 16, 2026 @ $925.15 | Sep 9, 2026 @ $907.00 | Loss | +11.9% · -1.24R |
| Falling wedge | Jul 8, 2026 @ $966.40 | Jul 10, 2026 @ $913.73 | Loss | +2.0% · -2.11R |
| Falling wedge | Jul 7, 2026 @ $967.52 | Jul 10, 2026 @ $913.73 | Loss | +12.0% · -1.26R |
Historical examples from the published simulation. This selection is not a win-rate sample.
Price was turned away at a ceiling near $1,038.41 about 3 months ago and has been sliding since. On the weekly chart, the next floor below sits near $844.06 — still about 10% away.
| Date | Open | High | Low | Close |
|---|---|---|---|---|
| Sep 1, 2026 | $947.35 | $952.10 | $935.93 | $939.96 |
| Aug 31, 2026 | $945.19 | $949.30 | $940.71 | $943.89 |
| Aug 28, 2026 | $938.94 | $953.73 | $937.11 | $945.47 |
| Aug 27, 2026 | $948.27 | $948.85 | $933.25 | $934.66 |
| Aug 26, 2026 | $960.58 | $964.45 | $954.54 | $956.12 |
| Aug 25, 2026 | $965.86 | $969.05 | $959.89 | $960.01 |
| Aug 24, 2026 | $953.01 | $974.49 | $951.39 | $971.40 |
| Aug 21, 2026 | $939.64 | $949.90 | $933.82 | $947.74 |
| Aug 20, 2026 | $931.15 | $944.22 | $925.77 | $933.51 |
| Aug 19, 2026 | $960.23 | $978.70 | $956.00 | $956.99 |
Technical analysis for informational purposes only — not investment advice. Auto-detected patterns and levels update daily; the chart above is live.