Our technical scanner runs daily across the S&P 500 and Nasdaq 100, measuring a broad set of momentum, trend and oscillator indicators to identify stocks showing the most concentrated clusters of bearish signals. Each Monday through Friday we publish the five names that rank highest on bear signal count — these are potential short candidates, meaning stocks where the technical evidence suggests price weakness may continue. Today’s scan date is 19 October 2026.
Important risk warning: Short selling is significantly more complex and risky than buying equities. Losses on a short position are theoretically unlimited, borrowing costs can erode returns, and a stock can be subject to a short squeeze at any time. The technical signals below are informational only and should never be acted upon without your own thorough due diligence and an appropriate risk-management framework.
1. Leidos (LDOS) – 13 technical sell signals
Price: $133.78 | Daily change: -3.88%
View the full technical analysis of Leidos
Leidos tops today’s bear-signal ranking with 13 bearish technical indicators firing against only 3 bullish ones, and the stock dropped nearly 4% on the session — a notable move for a defence contractor of this size. The technical picture is firmly negative, with price action suggesting that sellers are in control across multiple timeframes.
On the fundamental news front, the story is more nuanced. Leidos has had an active few weeks of contract activity: the UK Ministry of Defence extended its Leidos Contracted Logistic Support (LCST) programme for a further year, a relationship that has been in place since 2015. Separately, the company was awarded a sole-source contract worth approximately $318 million to support the Military Health System Genesis platform. A further award from the Naval sector, valued at around $56 million, was also recently announced.
Despite this steady flow of contract wins, the market has responded negatively, which itself may be a warning sign. When positive news fails to lift a stock, it can indicate that either the news was already priced in, or that broader selling pressure is overwhelming the fundamental backdrop. Bears will point to the divergence between newsflow and price action as a signal worth watching.
2. Omnicom Group (OMC) – 13 technical sell signals
Price: $81.76 | Daily change: -5.03%
View the full technical analysis of Omnicom Group
Omnicom Group shares fell over 5% on the day, making it the weakest price performer in today’s list. The stock carries 13 bear signals against 6 bull signals, and the chart reflects a pattern of persistent selling pressure. With third-quarter earnings due on 22 October, the timing of this technical deterioration ahead of a major catalyst is particularly notable.
Recent newsflow has been mixed. Barclays trimmed its price target on the stock in mid-October while maintaining an Equal Weight rating — a sign that even a broadly neutral analyst community is recalibrating expectations downward. Earlier in the month, leadership changes at the Omnicom Advertising division contributed to a session loss of around 3.5%, raising questions about organisational continuity at a time when the advertising industry is navigating a complex macro environment.
On the positive side, Omnicom Health’s strong awards haul and several reported media wins suggest the underlying business remains competitive. However, bulls will need the upcoming earnings report to deliver a convincing beat and reassuring outlook to counteract the current technical slide. Until that clarity arrives, the chart continues to favour the bears.
3. Palo Alto Networks (PANW) – 13 technical sell signals
Price: $328.48 | Daily change: -9.28%
View the full technical analysis of Palo Alto Networks
Palo Alto Networks is the most dramatic mover on today’s list, declining more than 9% in a single session — an extraordinary move for a large-cap technology stock. The 13 bear signals against just 3 bullish ones underline how decisively the technical picture has deteriorated. A drop of this magnitude will have triggered stop-loss orders across multiple levels of technical support.
The catalyst appears to be a downgrade from Phillip Securities, which spooked investors earlier in the week when the stock initially fell around 4.7% in response. Today’s additional selling suggests that institutional repositioning may still be under way. It is worth noting that Citigroup’s analyst simultaneously maintained a Buy rating and raised their price objective to $440 — demonstrating how sharply the analyst community is divided on this name right now.
For short sellers, the key risk here is precisely that bullish institutional support: a stock with a sizeable analyst consensus on the buy side and a high short interest can be vulnerable to rapid reversals. The cybersecurity sector remains structurally in demand, and PANW’s platform consolidation strategy has had genuine commercial traction. Bears should be mindful that the technical weakness, while striking, is unfolding against a backdrop of continued fundamental support from some quarters.
4. Autodesk (ADSK) – 12 technical sell signals
Price: $241.73 | Daily change: -2.41%
View the full technical analysis of Autodesk
Autodesk registers 12 bear signals against only 3 bullish ones, and has been in a sustained downtrend since late August. Over the past year the stock has lost around a quarter of its value, a significant underperformance that reflects both company-specific concerns and broader caution around software valuations. The daily session loss of approximately 2.4% adds to an already bruised technical picture.
The fundamental backdrop has been challenging. Back in August, the company issued full-year adjusted earnings guidance whose midpoint disappointed analysts, triggering a sharp sell-off. Since then, the stock has struggled to find consistent buying interest despite falling to levels that some commentators describe as potentially attractive from a valuation perspective. A notable development was French industrial group Schneider Electric’s announcement of a large acquisition in early October, which briefly lifted Autodesk shares — suggesting the market still sees strategic value in the business.
The tension between a depressed valuation and a weakening chart is a classic dilemma for both bulls and bears. Short sellers will focus on the persistent downward trend and the lack of a credible near-term catalyst to reverse it, while those considering a long position will note that the valuation reset may eventually attract buyers. The technical evidence currently favours caution.
5. Constellation Brands (STZ) – 12 technical sell signals
Price: $129.35 | Daily change: -0.98%
View the full technical analysis of Constellation Brands
Constellation Brands rounds out today’s list with 12 bear signals and 6 bullish ones — the highest bull count among our five candidates, which means the technical picture is somewhat more contested here than for the other names. The daily decline is the mildest of the group at under 1%, and the stock has shown some signs of stabilisation following a turbulent few months.
Constellation’s shares hit eleven-year lows in early October, prompting warnings from market observers about the danger of attempting to catch a falling knife. The subsequent second-quarter earnings release provided some relief: results beat consensus estimates on both revenue and earnings, the company reaffirmed its dividend, and management maintained its fiscal 2027 earnings guidance. Jim Cramer highlighted the stock’s recovery after the print, and several value-oriented commentators noted that the shares trade at a single-digit earnings multiple.
The stock continues to trade below all three of its key daily exponential moving averages, however, which is a structurally bearish configuration regardless of the recent bounce. For short sellers, the elevated bull-signal count and post-earnings recovery introduce meaningful risk of a squeeze. The fundamental case for a recovery is not without merit, and those considering a short position should size it accordingly and define their risk clearly before entering.
Disclaimer: This article is produced for informational and educational purposes only and does not constitute financial advice, a recommendation to buy or sell any security, or an invitation to trade. Technical analysis identifies patterns in historical price data and cannot guarantee future results. Short selling involves substantial risks including potentially unlimited losses. Always conduct your own research and consult a qualified financial adviser before making any investment decision. The Wall Street Stock Investors Club and its contributors may hold positions in securities mentioned.