Chidori Sucks, needs high speed to make it efficient and needs Sharigan or Byakugan to complete it...or else anyone that see that jutsu could dodge it and counter it, and there is nothing Chidori can do. If Naruto learns Chidori and combined Rasengan to it...my theory is that it can complete it too...because it won't need high speed and the lighting is spinning around that orb very fast...LMAO..Just a Thought