Finding maximum value is failing

[MySchizoBuddy]

I'm trying to find the maximum value of a curve. simple stuff.

but it fails and gives totally wrong answers.

File is attached M14

[RichardJ · Accepted solution]

The answer it's giving you is correct, it's just not the answer you want.

[MySchizoBuddy]

Thank you

btw which of these is the fastest Quasi-Newton, Conjugate gradient or Maximize function

[RichardJ]

Maximize uses either Conjugate Gradient or Quasi-Newton as the algorithm. There is no way to know a-priori which will be faster.

[RichardJ]

If you use Maximize you are guaranteed to actually find a maximum. You can also constrain it so that the maximum found must lie in the forst 24 hours. see the attached for a slight modification.