2904 TAI Week ended 21 Aug 2026

Weekly Investor Report

Prime Oil Chemical Service Corporation · Energy · Oil & Gas Equipment & Services

Open interactive chart View report data
Latest close 12.90 TWD
1.2% latest week
Weekly setup

Weak trend

The weekly trend is not active. Price is -12.5% below the Trend Line and sits at 10.9% of its 52-week range. The latest completed week returned 1.2%, after a -4.4% four-week move.

Setup score 30 out of 100
Latest Close 12.90 TWD 21 Aug 2026
1W Return 1.2% latest completed week
4W Return -4.4% short-term follow-through
12W Return -3.8% quarterly tape
Trend Breadth 15.4% 8 of 52 weeks active
Volume Ratio 1.1x vs 13-week average
What is working
  • Latest weekly return ranks in the strongest part of its sector group.
What could go wrong
  • The trend backdrop is inactive, so price action has not confirmed a constructive regime.
  • Price is below the Trend Line, which keeps downside pressure in focus.
  • Price is below Fair Value, so the market is still discounting the latest tape.
  • Activity pressure is negative, which weakens the current setup.
What to watch next
  • Trend Line remains the key weekly regime level.
  • Activity pressure is the gauge to monitor for confirmation or fade.
  • A volume ratio above 1.5x would show stronger participation in the next move.
Price follow-through 1.2% Latest completed week; four-week move -4.4%. Indicator stack 8/50 Trend and activity pressure are weighted against the latest 12-week confirmation window. Trend backdrop Active The trend backdrop defines the current weekly regime. Patient Capital Quiet Activity-pressure buy-signal status for institutional accumulation timing. Next-Week Expectancy Negative 33.20% Historical one-week expectancy contributes to the evidence score when direction is confirmed.
01 · Price action

Where price is—and whether the trend supports it

The weekly trend is not active. Price is -12.5% below the Trend Line and sits at 10.9% of its 52-week range. The latest completed week returned 1.2%, after a -4.4% four-week move.

Study the full chart

52-week price path

Price vs Trend Line and Fair Value
Price Trend Line Fair Value
02 · Volume and demand

Is real participation confirming the move?

Latest weekly volume is 1.1x the 13-week average. Participation is around or above normal and provides reasonable confirmation.

26-week volume confirmation

Bar height shows volume; colour shows the weekly price direction
27 Feb 6 Mar 13 Mar 20 Mar 27 Mar 3 Apr 10 Apr 17 Apr 24 Apr 1 May 8 May 15 May 22 May 29 May 5 Jun 12 Jun 19 Jun 26 Jun 3 Jul 10 Jul 17 Jul 24 Jul 31 Jul 7 Aug 14 Aug 21 Aug
Up week Down week
Demand beneath price

Activity pressure and institutional-style signals

These indicators assess whether participation is improving beneath the headline price move. They are supporting evidence, not proof of institutional buying.

Activity pressure path

Latest 0.1012-week average 0.03

12-week confirmation

Trend active0/12Active trend-backdrop weeks in the latest 12-week window.
Positive pressure0/12Weeks with constructive activity pressure in the latest 12-week window.
Positive leadership0/12Weeks with positive relative leadership in the latest 12-week window.
Activity pressure0.10Current proprietary activity-pressure read.
Buy signals0Accumulation signal count in the latest 12 weeks.
Reversal markers0No reversal markers

No recent accumulation markers. No reversal markers.

03 · Momentum and leadership

Is performance persistent—and is the stock leading?

Performance is -4.4% over four weeks, -3.8% over 12 weeks, and -22.5% over one year. The current trend has remained active for 0 consecutive weeks.

Performance by holding period

1W1.2%
4W-4.4%
12W-3.8%
26W-20.5%
52W-22.5%
Active trend streak0 weeks
Active weeks in one year8
Trend breadth15.4%

Activity pressure vs relative leadership

Activity pressureRelative leadership
Pressure-0.29Latest activity-pressure read.
Pressure change67.9%Four-week change in activity pressure.
Leadership-40.27Latest relative-leadership reading.
RS change-2.6%Four-week change in relative leadership.
04 · Fundamentals and valuation

What investors are paying for—and the quality behind it

A published fundamentals and factor snapshot is not available for this company.

Open full factor analysis

No published fundamental snapshot is available for this company.

05 · Ownership, options, and sentiment

What other market participants are doing

Options, insider transactions, market sentiment, and activity-pressure signals can confirm or challenge the price story. None should be used alone.

Insider activity-

No recent insider transactions are stored for this company.

News sentiment-

No current sentiment snapshot is stored.

Patient CapitalQuiet

Activity-pressure buy-signal evidence highlights potential institutional accumulation windows.

No recent buy signal
06 · Catalysts and risk

What can move the shares—and how volatile the path has been

Event timing, options-implied movement, drawdown, and weekly return distribution frame the risk around the current setup.

Next earnings-No event is currently stored.
Options expected move-Nearest-chain priced movement where available.
52-week drawdown-24.0%Distance below the 52-week high.
13-week volatility1.6%Standard deviation of weekly returns.

Weekly gains and losses

Latest 26 completed weeks

Each bar is one week. Gains rise above the zero line; losses fall below it. Taller bars mean a larger weekly move.

Weeks higher7 of 2614 weeks finished lower.
Best week+2.2%Week of 10 Jul.
Worst week-6.3%Week of 15 May.
Latest week+1.2%Week of 21 Aug.

Shape of recent returns

Strong gains0
Modest gains7
Flat weeks5
Modest losses12
Sharp losses2
Recent vol1.6%13-week weekly-return volatility.
Base vol1.6%52-week weekly-return volatility.
Up/down split16/26Count of positive and negative weeks in the 52-week window.
Average skew1.0% / -1.6%Average positive week versus average negative week.
07 · Sector and peer context

Is this stock leading—or simply moving with its group?

Sector and industry breadth distinguish company-specific strength from a broad group move.

SectorTW Energy
4-week rank1 / 3
Group average-7.0%
Trend breadth33.3%
Trend33.3%active weekly trend signals
MD33.3%positive activity pressure
RS33.3%positive relative leadership

Four-week leaders

2904 · TAI-4.4%1516 · TAI-5.0%6505 · TAI-11.7%
IndustryTW Oil & Gas Equipment & Services
4-week rank1 / 1
Group average-4.4%
Trend breadth0.0%
Trend0.0%active weekly trend signals
MD0.0%positive activity pressure
RS0.0%positive relative leadership

Four-week leaders

2904 · TAI-4.4%
08 · Evidence and weekly data

The underlying research record

Every top-level statement above should be traceable to a stored market, fundamental, event, or positioning observation.

Weekly tape27/100

Trend, activity pressure, participation, and risk combine to a 27/100 tape read.

 Indicator analysis10/100

Latest 12-week confirmation: trend 0/12, activity pressure 0/12, relative leadership 0/12.

Activity pressure 0.10; No reversal markers Next-Week ExpectancyNegative 33.20%

Next-week expectancy is negative with a 33.20% historical one-week setup read.

Adds short-term historical context without overriding trend, activity, or relative leadership. Factors50/100

No published factor snapshot is available yet.

 Patient CapitalQuiet

Activity-pressure buy-signal evidence highlights potential institutional accumulation windows.

No recent buy signal Sentiment50/100

No sentiment snapshot is stored yet.

 Insiders50/100

No recent insider transaction evidence is stored.

 Earnings50/100

No stored earnings event is currently attached to this ticker.
WeekCloseReturnTrend LineFair ValuePressureLeadershipVolumeTrend
21 Aug 202612.90 TWD1.2%14.74 TWD16.11 TWD-0.29-40.27245.3KOff
14 Aug 202612.75 TWD-3.4%14.85 TWD16.13 TWD-0.45-42.65298.3KOff
7 Aug 202613.20 TWD-1.9%14.97 TWD16.16 TWD-0.56-39.49151.0KOff
31 Jul 202613.45 TWD-0.4%15.07 TWD16.19 TWD-0.67-37.77143.6KOff
24 Jul 202613.50 TWD-2.5%15.16 TWD16.21 TWD-0.89-39.24165.8KOff
17 Jul 202613.85 TWD-1.1%15.25 TWD16.24 TWD-1.14-37.1834.2KOff
10 Jul 202614.00 TWD2.2%15.34 TWD16.26 TWD-1.38-41.160Off
3 Jul 202613.70 TWD1.8%15.42 TWD16.28 TWD-1.56-45.05268.3KOff
26 Jun 202613.46 TWD0.0%15.51 TWD16.30 TWD-1.63-44.20139.7KOff
19 Jun 202613.46 TWD0.0%15.60 TWD16.33 TWD-1.64-47.31266.0KOff
12 Jun 202613.46 TWD-0.7%15.69 TWD16.35 TWD-1.59-45.45383.8KOff
5 Jun 202613.56 TWD1.1%15.79 TWD16.37 TWD-1.55-47.00365.2KOff
29 May 202613.41 TWD-1.1%15.88 TWD16.40 TWD-1.52-48.01354.9KOff
22 May 202613.56 TWD-4.0%15.98 TWD16.42 TWD-1.49-45.24505.5KOff
How to use this report

This is a completed-week research summary. It explains the available evidence and its conflicts; it does not predict a guaranteed outcome or replace your own risk assessment. Fundamental figures may refer to an earlier financial reporting period, which is shown above.

Evidence context