How do I set the challenge difficulty?

The difficulty of each challenge needs to be intrinsically linked to the perceived value of the reward. We have developed a fancy in-house algorithm that calculates how difficult the challenge will be. 
Some advice in regard to the difficulty is provided to you in the onboarding pack you've received when registering with us. You don't have to follow our guidelines, you're free to do whatever you want. It's a free country!