Dual Sign Lord's Dasha

[Aum]

First half of a Dual Sign lord's dasha depicts it's Mooltrikona Sign and the second half for the other sign.

For eg.,

Mars (AD/MD) first half is characteristic of Aries placement (House and Planets there)
Second half is tuned to Scorpio placement (House and planets there)

Is this a tenable theory??

Any supportive texts out there?

Thanks!

[astrostar]

First half of a Dual Sign lord's dasha depicts it's Mooltrikona Sign and the second half for the other sign.
For eg.,
Mars (AD/MD) first half is characteristic of Aries placement (House and Planets there)
Second half is tuned to Scorpio placement (House and planets there)

Mars dasha contains 9 planets sub periods - Ma, Ra, Ju, Sa, Me, Ke, Ve, Su, Mo.

Suppose, if Rahu is in Scorpio, then, Scorpio Rahu sub period comes in first half.
And if Sun, Moon are in Aries, then, these sub periods come at last.

Aries and Scorpio are quite opposite signs - one is fiery, and the other is watery.
But Mars owns these both signs. What does it mean? Mars has inbuilt qualities of both these signs.

Which quality would be higher or operates during dasa sub periods ?, depends on planets placements in these signs and aspects on these signs.
The matter is not about first half or 2nd half.

Is this a tenable theory??
Any supportive texts out there?

This notion is wrong.
Also, even if there are supportive texts, I totally disagree with the texts.
Bcz, interpretation/author is wrong.