The middle point between Mercury and Venus makes a conjunction to the Sun. In other words, the Sun is located exactly between Mercury and Venus:

The Efficiency Test shows the presence of downtrend movement one week before this event:

This strategy covers 52% downtrend movements. And this is not a bad result because "in average" we have only 47% down movements.

Regarding uptrend tendency, this strategy (6 before->4 before) provides 57.6% uptrend movements, while the average level is 53%.