private void SingleCycle()
{
// poznaj kurs
double kurs = h.Courses(eid)[cid];
int dalem = h.PersonalStake(uid, eid, cid);
double x = (kurs - cref) * reaction;
double nowe_dalem = money * (1.0 - Math.Exp(-x));
if (nowe_dalem < 0.0)
{
nowe_dalem = 0.0;
}
int dokup = ((int)nowe_dalem) - dalem;
h.Trade(uid, eid, cid, dokup, true);
}