The Mystic (Lian Zhen, 廉贞) in the Self palace (Ming Gong, 命宫)

What the classic says, Zi Wei Dou Shu Quan Shu (紫微斗数全书), volume two

The trapped (囚) star, and the second peach blossom (桃花). In the seat of the self, an imposing nature and a strong will — able to clear out the old and set up the new, and clean in office. In an idle palace with the Wolf (贪狼), the Disruptor (破军), the Blade (擎羊), the Flare (火星) or the Trouble transformation (化忌) met, neither money nor office sits easily. Badly placed in an idle palace, benefics do not clear it: injury at the waist and legs, and with harsh malefics added the text reads it as fatal.

廉贞属火，北斗化次桃花杀、囚星，为官禄主。廉贞入男命吉凶诀：廉贞守命亦非常，赋性巍巍志气强，格故鼎新官大贵，为官清显姓名香。廉贞坐命落闲宫，贪破羊火忌相逢，纵有财官也不美，平生何以得从容。廉贞落陷入闲宫，吉曜相逢也有凶，腰足灾残难脱厄，更加恶杀命该终。廉贞入女命吉凶诀：女人身命值廉贞，内政清廉格局新，诸吉拱照无杀破，定教封赠在青春。廉贞贪破曲相逢，陀火交加极贱庸，定主刑夫并克子，廉贞入限吉凶诀：廉贞入限旺宫临，喜逢吉曜福骈臻，财物自然多蓄积，任人得意位高升。

Part of this clause fixes a woman’s outcome by her sex; it is left out here, in the Chinese as well as the English, as everywhere on this site.

“Well placed” and “badly placed” refer to the star’s brightness in the branch the palace falls on: the same star in the same palace reads differently bright and dim, and the clause says how.

Source

How this placement actually turns up

• Well placed (exalted or strong) in 17% of those charts, badly placed (fallen) in 17%, in between the rest.
• Alone in the palace in 17%; sharing it with The Minister (天相) 18%, The General (七杀) 17%, The Wolf (贪狼) 17%, The Disruptor (破军) 16%, The Treasury (天府) 15%.
• Carries a birth-year transformation in 21%: Fortune (化禄) 10%, Trouble (化忌) 11%.
• How often the conditions the classic’s line names actually occur — one of the four difficult stars (擎羊陀罗火星铃星) in the palace with it: 30%; one of the six helper stars (左辅右弼文昌文曲天魁天钺) with it: 41%; Lu Cun (禄存) with it: 9%.

Counted by casting every day from 1950 to 2009 at each of the twelve hours — 262,980 charts, 8.3% of which have The Mystic here (every main star sits in every palace in about one chart in twelve). A count, not a reading.