Factors that make a planet stronger:
1. In its home or ruling signs.
2. Aspected by Jupiter.
3. Conjunct an angle or aspecting an angle. (AC, MC, DC, IC)
4. In an angular house (1st, 4th, 7th, 10th)
Factors that make a planet weaker:
1. In its signs of detriment or fall.
2. Aspected by Saturn or Neptune.
3. Intercepted.
4. In a cadent house (3rd, 6th, 9th, 12th)
The relative strength of your chakras is affected by meditation. For example, if your natal Venus is weak but you meditate a lot on your throat chakra, your throat chakra will be stronger than your other chakras. To know the real relative power of your chakras, meditate until you are sensitive enough to feel energy. When you can feel energy, you will be able to easily feel which of your chakras are stronger and which are weaker.