Works not as expected

Hi support...

I have an issue using the cAlgo Plattform by developing a robot.

I have developed an indicator, which shows the trend change as a histogram, see picture 1.

After inspectting the output values from the indicator (picture 2), it looks great....but using this indicator for executing a trade there was a 
great difference of the given values... (picture 3)
I have traced the output values from the indicator and the robot and for example:

From the 30th Jan 2018 until now the indicator on the chart prints only buy signals, but the indicator used by the robots have some sell signals. after trying different things I'm notat the end.... no idea why there is this kind of error...

Would you please help me? I can send you the sources from both, if needed for a deeper inspection...

I have attached some pictures...maybe this helps you to understand the problem. 
I'm developing since 30 years and some year wtih your API, but I no idea yet....

Sincerely
Markus