@ arkhe:
Usually, things to consider when choosing a signal provider (from professional traders) are:
1.Trade: Total number of transactions ever made
2. ROI (Return On Investment): the percentage of profit that the trader has earned compared to the capital used, the larger the ROI the better.
3.Avg Pips (Average Pips): average profit pips per transaction
4.Win %: Win ratio (profit) of each transaction.
5.Avg trade time (Average tradetime): average duration of trading each transaction
6.Max DD (Drawdown) %: the largest decline during trading (in percent) against capital.
7.Max DD (Drawdown) pips: the largest decline in pips.
8.Follower: Number of followers.
For more information, you can read: How to Choose a Signal Provider on ZuluTrade