/**
  * @test
  */
 public function create_custom_simulation()
 {
     $simulator = new Simulator();
     $simulator->startPrice(100);
     $simulator->simulate(10, 0.01, 0.1);
     $simulator->simulate(10, 0.02, 0.05);
     $simulator->close();
     $this->assertNotEquals(100, $simulator->close);
 }