I understand now that the FSB Pro indicators only read data from the market. They do not connect to the account, so they cannot use balance or percent to give signals. This is safer because it does not risk account access. The Top 10 Robots app sounds useful with similar features. I think adding this to new software will help many traders. It will make trading easier and more automated.
This is the way the current program was built and it can be considered as a limitation, but not as a safer option, it's nothing to do with safety
And the indicator Ridwan is mentioning, is hard-coded to the program, and in this case it has access to position info. Custom indis do not have this possibility, hence it cannot be done unfortunately.