RSI Oversold, BYD Stock Drops 3.39% on Wednesday

BYD closed at HK$71.15 on Oct. 21, down 3.39% for the day and at its lowest level in 20 trading days, putting the Hong Kong-listed shares near their three-month low. The stock is under pressure. Oversold momentum indicators suggest selling has become stretched, but they have not yet confirmed a turn higher.

Trend & Price Action

The decline extends a weaker pattern: BYD fell 2.87% over five days and 12.38% over one month. Its last price sits below the declining 20-day simple moving average (SMA), at HK$75.32, and the 50-day SMA, at HK$82.07. The 20-day average has fallen 2.44% over five days, a sign that the short-term trend is still pointing down rather than stabilizing. There has been no fresh moving-average crossover to suggest a change in that structure. The share price is also at the bottom of its recorded three-month range, whose high is HK$96.65. A position at the range floor makes the level important, but it does not make it firm support: the price may stabilize there, or fall through it if sellers remain dominant. As shown in the chart, the Bollinger Bands—a measure of how far price has moved relative to its recent average—span HK$69.98 to HK$80.66, with the middle band at HK$75.32. BYD’s position near the lower band, reflected in a %B reading of 11%, shows pronounced weakness. The band width of 14.2% is normal, rather than unusually narrow, so the data do not point to a volatility squeeze that is about to resolve.

Oscillators & Momentum

The Relative Strength Index (RSI), which gauges the speed of recent price moves, is at 29.3, in oversold territory. The Stochastic oscillator is similarly depressed: %K is 0.0 and %D is 20.3. These readings indicate that selling has been intense, and can precede a rebound, but neither indicator alone establishes that a low is in place. The MACD offers a modest counterpoint. Its reading remains negative at -2.667, but the histogram is positive at 0.132, meaning the MACD line is slightly above its signal line. That suggests downward momentum may be easing at the margin—not that the broader trend has turned. The price remains below both moving averages, while the falling OBV, a measure derived from volume and price direction, indicates that trading flows have not yet confirmed renewed demand.

Volatility, Volume & Key Levels

Trading volume reached 19,478,240 shares, about 1.2 times the 20-day average of 16,076,779. Elevated turnover on a down day, alongside falling OBV, is consistent with active selling rather than a quiet retreat. The average true range (ATR) is HK$2.21, or 3.1% of the share price, indicating moderate day-to-day movement. The immediate level to watch is HK$71.15, the 20-day support reading and the three-month low. A sustained break below it would put the recent range floor under pressure; holding above it while momentum improves would offer an early sign of stabilization, not confirmation of a reversal. Overhead, HK$75.32 is the 20-day average and middle Bollinger Band, while HK$81.35 is the stated 20-day resistance. A move toward resistance would have to contend with the declining trend and the 50-day average at HK$82.07.

Technical Verdict: HOLD (wait & see)

The technical picture supports a wait-and-see stance: BYD is oversold, but its falling trend and weak volume-flow signal have not confirmed a reversal. The main evidence is the declining 20-day average and price below both moving averages; RSI and Stochastic in oversold territory; and the positive MACD histogram, which hints that downside momentum may be easing. This verdict is invalidated if the price breaks below HK$71.15.

• Illustrative entry range: HK$69.98–HK$71.15, bounded by the lower Bollinger Band and current support.
• Illustrative exit target: HK$75.32, the 20-day average and middle Bollinger Band.
• Illustrative stop-loss protection: below HK$69.98, the lower Bollinger Band.

These levels describe a technical setup, not an investment recommendation; in plain English, the shares look stretched to the downside, but the chart has yet to show that buyers are firmly back in control.

Data: exchange information via Yahoo Finance, as of Oct. 21, 2026, 15:08 WIB.

Summary Data BYD

Last price	71.15 HKD
Change 1 day / 5 days / 1 month	-3.39% / -2.87% / -12.38%
Trend / MA-cross	downtrend / none
SMA20 / SMA50	75.32 / 82.07
RSI (14) / Stochastic %K	29.3 / 0.0
Bollinger %B / ATR	11% / 2.21
Support / Resistance 20 days	71.15 / 81.35
Data as of	21 October 2026 15:08 WIB

Disclaimer: This technical analysis is generated automatically from exchange data (via Yahoo Finance) and indicators calculated by JournalArta, for information and education only. The verdict and the entry, target and stop-loss levels are not investment advice or a solicitation to buy or sell any security. Investment decisions and their risks rest solely with the reader.