3.1 Decade Luck (十年大運) - MOST CRITICAL
⭐ Importance Principle
Decade Luck determines macro environment; if ten years are negative, even positive years within provide minimal benefit.
Analogy : Decade Luck is the season—trying to farm in winter (bad Decade) yields poor harvest even on sunny days (good Years).
Analysis Focus
1
How Decade Luck interacts with Natal Chart via combination→generation→conquest
2
Which Five Elements become injured
3
Map injuries to Ten Spirits (財官印食比) for ten-year fortune trajectory
4
Assess whether Day Master attack intensifies or alleviates
Key Insight : Heavenly Stem and Earthly Branch of Decade Luck act simultaneously —not "first 5 years Stem, latter 5 years Branch" as some schools teach.
Case Study - Continuous Generation in New Decade
Original problematic chart enters 乙卯 Decade:
- Heavenly : 辛→癸→乙→丁 forms unbroken generation chain
- Earthly : 亥→卯→巳 forms unbroken generation chain
- Result : Entire fortune reverses from crisis to harmony
Takeaway : Single Decade Luck shift can completely transform life trajectory—timing career moves, investments, and major life decisions around Decade boundaries is paramount.