robertogozzi wrote:

I use 10000 steps (1 hour), so you can use 3000 (30 minutes)

But that would give you times such as:

170000

173000

176000 (not a valid time)

179000 (not a valid time)

182000

You will have an awful lot of tests with no results to run through.

Perhaps optimising with two variables would be better and more efficient. MyHour 0 to 23 in steps of 1 and MyMinute 0 to 1 step 1 and then add the following to the start of your strategy: