I am trying to access the RSI value dynamically based on symbol but I get - 

The code is on line number - 67. any pointers will help me a lot. Thank you

Runtime Error: Trying to dynamically access a method that does not exist throws a TypeError exception. To prevent the exception, ensure each parameter type matches those required by the RSI method. Please checkout the API documentation.
at OnSecuritiesChanged in main.py:line 30
at __init__ in main.py:line 67
TypeError : No method matches given arguments for RSI (Open Stacktrace)