ISVLF - Impact Silver

Help... Should I sell now?

The last two days have been great for the spot price of silver. Impact Silver which has up to now been great at exceeding a 1 to 1 ratio tracking the spot price, has gone flat to negative the last two days as the spot price has exploded 6+% daily.... I don't understand why there is such great resistance when the spot price is doing what it's doing?? Any thoughts?