I only have been working on it for gold , but it should work similarly for silver as well.
This includes no pyramiding, and with pyramiding orders of 5, this strategy is upwards of 100% profitable.
Buy order - when price is above the 162 day and is less than 35
Sell order - when price is below the 162 day and is greater than 65
I will probably be adjusting it to increase the profitability and %success rate.