Here is another question for you... Although I feel this is a simple question. . Perhaps another thinks otherwise. . Here goes. .

Much like what the subject says,

I do not understand how you define losing so please do post your own description so we may understand. . Also, please post your reason for voting such...

So anyway, in my opinion, losing is a requirement...
Losing for me is when you lost big time/bigger than what you planned by over-trading or not after your reduction loss. .

I voted Yes because it was through this loss I was shaken to my perceptions...

So in the event that you think otherwise, then please post your opinion. .

Joyful discussion!

P.S.
Please also take note that the words I used were to be successful rather than in trading. .
But if you want, you can alter it Is losing a requirement in trading? But I doubt if anyone will reply No...