static void hasOrders(Simulator simulator) { IsTrue(O.hasContent(simulator.allOrders())); }
static void noOrders(Simulator simulator) { IsTrue(O.isEmpty(simulator.allOrders())); }
static void hasPosition(Simulator simulator) { IsTrue(O.hasContent(simulator.allPositions())); }
static void noPosition(Simulator simulator) { IsTrue(O.isEmpty(simulator.allPositions())); }
static void tick(Simulator simulator, Bar current, Symbol symbol) { symbol.publish(current); simulator.waitForTick(); }