AssertionError when adding relativestrategy profile.

[Byte1122]

Great project! Everything is up and running. I get this little error when trying to add a relative strategy profile. (for example, sell 0,002 and buy 0,001)

AssertionError at /admin/core/relativestrategyprofile/add/
No exception message supplied
Request Method: POST
Request URL: http://localhost:8000/admin/core/relativestrategyprofile/add/
Django Version: 1.8
Exception Type: AssertionError
Exception Location: /cointrol/cointrol/cointrol/core/models.py in save, line 126
Python Executable: /Library/Frameworks/Python.framework/Versions/3.6/bin/python3.6
Python Version: 3.6.0
Python Path:
['/Library/Frameworks/Python.framework/Versions/3.6/bin',
'/Library/Frameworks/Python.framework/Versions/3.6/lib/python36.zip',
'/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6',
'/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/lib-dynload',
'/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages',

[Byte1122]

deleted "assert"