I would argue that this scenario would actually be a positive for the author. If others start using the same methodology as him on a large enough scale and trad

I would argue that this scenario would actually be a positive for the author. If others start using the same methodology as him on a large enough scale and trading on the same data sets they would buy when he buys driving prices up. On the other hand when he starts selling and others sell as well speed is a critical factor as the downward pressure will make the later movers the biggest losers.