Deriving your entry, target/stoploss levels with the help of more than one method of strategies will definitely more effective than what usually traders do with only one strategy. The thing here is, you must need to be wise enough to pick "related" strategies to combine. You cannot have extremely different strategies at a time to generate your signals but strategies can do confluence by nature, will do the job up to our expectations.

No, there is no other way available to do so. Some people may suggest to buy signals from any such service providers. But, such paid signals are known of less accurate; hence overall, you may or may not make money by relying on such services.