You can tell how quickly your desire will come true by the way a candle burns:
If the candle emits black smoke when you first light it, it is removing negative energy from your desire, helping you manifest it faster.
If the smoke is white, your desire will come true, but there may be some delay or struggle before this happens.
If the flame of the candle is weak, the candle is working very hard in order to remove an obstacle for you to get your hearts desire, but it may take some time to accomplish it.There some heavy retaliation against you, and you may need to have patience.
If the flame is jumping, there is spiritual warfare going on and the flame is fighting back against a psychic attack.
Smoke Facing You
If the smoke is blowing in your direction, your prayer is being acknowledged, and will be easily granted. If, on the other hand, the smoke is blowing away from you, you will still need to persevere a lot in order to have your desire come true.
Smoke Facing the Sides
If the smoke is blowing to the right, you will have success if you use your intellect in order to obtain your desire. Although if the smoke is blowing to the left, you are being warned that you are becoming too emotionally involved in your desire, which may prevent it from coming true.
If you hear a crackling sound as the candle is being burned, then a spirit is working against some opposition on your behalf.