Focused on building reliable datasets, financial models, and research tools for value-minded investors. Committed to turning complex data into practical guidance for value-investing and long-term wealth.
Dr. Charlie Tian is the founder and CEO of GuruFocus.com, a leading global investment research platform established in 2004. With a Ph.D. in physics, Dr. Tian transitioned from science to finance, applying a data-driven, disciplined approach to value investing.
The Relative Strength Index (RSI) is a momentum oscillator that measures the speed and change of price movements. The RSI is most typically used on a 14-day period, measured on a scale from 0 to 100. Traditionally, an asset is considered overbought or overvalued when the RSI is above 70 and oversold or undervalued when it is below 30. A shorter period RSI is more reactive to recent price changes, so it can show early signs of reversals. 9-Day RSI is sometimes used together with 14-Day RSI in a two period divergence strategy.
The industry rank for Siamrajathanee PCL's 9-Day RSI or its related term are showing as below:
BKK:SO's 9-Day RSI is ranked worse than 54.31% of 1125
companies
in the Business Services industry
Industry Median: 50.58
vs BKK:SO: 71.93
Siamrajathanee PCL (BKK:SO) 9-Day RSI Explanation
The Relative Strength Index (RSI), developed by J. Welles Wilder in his book “New Concepts in Technical Trading Systems.”, is a momentum oscillator that measures the speed and change of price movements. The RSI is most typically used on a 14-day period, measured on a scale from 0 to 100.
Traditionally, an asset is considered overbought or overvalued when the RSI is above 70 and oversold or undervalued when it is below 30. A RSI surpasses the 30 level indicates a bullish sign, when it slides below 70 level, it’s a bearish sign. This level can be adjusted depending on the security’s pattern and the market’s underlying trend. In an uptrend or bullish market, the RSI might range within a higher interval, investors could set the support level higher. If a downtrend or bearish market occurs, investors may need to lower the resistance level.
RSI can also be used in trading techniques to indicate the trading signal, such as Divergences and Swing Rejections. A shorter period RSI is more reactive to recent price changes, so it can show early signs of reversals. 9-Day RSI is sometimes used together with 14-Day RSI in a two period divergence strategy.
Siamrajathanee PCL 9-Day RSI Related Terms
BKK:SO vs CTAS, CPRT, ULS: 9-Day RSI Comparison
For the Specialty Business Services subindustry, Siamrajathanee PCL's 9-Day RSI, along with its competitors' market caps and 9-Day RSI data, can be viewed below:
* Competitive companies are chosen from companies within the same industry, with headquarter located in same country, with closest market capitalization; x-axis shows the market cap, and y-axis shows the term value; the bigger the dot, the larger the market cap. Note that "N/A" values will not show up in the chart.
Siamrajathanee PCL 9-Day RSI vs Business Services Industry
For the Business Services industry and Industrials sector, Siamrajathanee PCL's 9-Day RSI distribution charts can be found below:
* The bar in red indicates where Siamrajathanee PCL's 9-Day RSI falls into.
* Note that the formula uses a positive value for the average loss.
* For Operating Data section: All numbers are indicated by the unit behind each term and all currency related amount are in USD. * For other sections: All numbers are in millions except for per share data, ratio, and percentage. All currency related amount are indicated in the company's associated stock exchange currency.
Siamrajathanee PCL (BKK:SO) has a 9-Day RSI of 71.93 as of Jul. 14, 2026. According to the industry distribution chart, Siamrajathanee PCL ranks #611 out of 1125 companies in the Business Services industry, placing it in the top 54.3%.
Is Siamrajathanee PCL's 9-Day RSI too high?
Siamrajathanee PCL's current 9-Day RSI is 71.93. The Business Services industry median 9-Day RSI is 50.58. Siamrajathanee PCL's value of 71.93 is 42.2% above this industry median. Based on the distribution chart, Siamrajathanee PCL ranks #611 out of 1125 companies in the Business Services industry, which is below the industry midpoint. Overall, Siamrajathanee PCL has a GF Score™ of 86/100 and is considered Modestly Undervalued, reflecting its overall financial health beyond just this single metric.
How does Siamrajathanee PCL's 9-Day RSI compare to CTAS and CPRT?
According to the Business Services industry distribution chart, Siamrajathanee PCL ranks #611 out of 1125 companies for 9-Day RSI. This places Siamrajathanee PCL in the lower half of its industry. The industry median 9-Day RSI is 50.58. Siamrajathanee PCL's value of 71.93 is 42.2% above this benchmark. See the competitive comparison table and distribution chart on this page for a detailed peer-by-peer breakdown.
What is a good 9-Day RSI for a Business Services company?
The median 9-Day RSI among Business Services companies is 50.58, based on 1,125 companies in the industry. Companies in the top quartile (top 25%) have a 9-Day RSI significantly above this median, while those in the bottom quartile fall well below. However, 9-Day RSI should not be evaluated in isolation — investors should consider it alongside profitability, growth, and financial strength metrics. Siamrajathanee PCL's current 9-Day RSI of 71.93 is 42.2% above the industry median. Use the industry distribution chart on this page to see where any company falls relative to its peers.
What does a high 9-Day RSI mean?
A high 9-Day RSI can signal that a stock is expensive relative to its fundamentals. For the Business Services industry, the median 9-Day RSI is 50.58 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Siamrajathanee PCL's current 9-Day RSI is 71.93. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Siamrajathanee PCL stock overvalued right now?
Based on GuruFocus' analysis, Siamrajathanee PCL (BKK:SO) is currently considered Modestly Undervalued. The stock's GF Value™ is ฿5.70, compared to a current price of ฿4.66 — trading 18.2% below its estimated fair value. The current 9-Day RSI is 71.93 and 42.2% above the Business Services industry median of 50.58. Siamrajathanee PCL's overall GF Score™ is 86/100 with 5 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is 9-Day RSI calculated?
9-Day RSI is calculated from a company's financial statements. For Siamrajathanee PCL (BKK:SO), the current 9-Day RSI is 71.93 as of Jul. 14, 2026. GuruFocus calculates this using data sourced from SEC filings and annual reports. See the calculation section and 30-year financial data on this page for the full breakdown.
Is Siamrajathanee PCL (BKK:SO) Overvalued in 2026?
Based on GuruFocus' analysis, Siamrajathanee PCL stock appears to be undervalued.
The current stock price of ฿4.66 is trading 18.2% below its estimated GF Value™ of ฿5.70.
GuruFocus considers Siamrajathanee PCL to be Modestly Undervalued.
Key valuation signals for BKK:SO:
9-Day RSI: 71.93
GF Value™: ฿5.70 vs. price of ฿4.66 (18.2% below fair value)
Industry Position: 42.2% above the Business Services median (#611 of 1125)
No single metric tells the full story. See the BKK:SO stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Siamrajathanee PCL is an outsourcing services company in Thailand for both the government and private sectors. It is principally engaged in providing outsourcing services and vehicle operating lease services. The company, along with its subsidiaries, is organized into business units based on its products and services and has the following reportable segments: the Outsourcing service segment, the Rental service segment, and others. A majority of its revenue is generated from the Outsourcing service segment, which provides services like Workforce management, corporate car rental, landscape maintenance, and industrial waste disposal. Geographically, the group operates only in Thailand.
86GF Score
Get the complete analysis for BKK:SO
9-Day RSI is just one metric. See GF Value™, 30-year financials, guru trades, warning signs, and more.
Quick Browse
Personalize
Premium Gurus 
Create New Portfolio
BKK:SO has been successfully added to your 
