I'm familiar with the pattern you speak of. With gold mines especially there seems to be some periods one must be very alert to. May is one of them. September (in colder climates) is another. Depending on how the drilling is progressing from spring to fall it's a bit of a balancing act in terms of when to buy and when to sell. 

What I find interesting about ME is that this year they want to firm up the 4.1 million ounces of gold and possibly increase that to an amount considerably higher. If they are able to do that it's not impossible that we could see some dramatic action with the sp. Due to poor market conditions, not likely as dramatic as ATC was in 2010 but still quite good. And what is really good is that all the infrastructure is right there. This isn't the Yukon we're talking about, this is Ontario mining country. Greenbelt...lots of gold, lots of roads!  IMHO