may be - yes, but it should be calculated.
For example, if you are on Metatrader 5 so you can use calculator of Signals -
Forum on trading, automated trading systems and testing trading strategies
Signal Subscriber Lot Size Question
Sergey Golubev, 2017.02.02 07:42
or you can calculate by yourself based on the following examples:
How to Select a Deal Volume https://www.mql5.com/en/forum/9950/page93#comment_4052813 https://www.mql5.com/en/forum/215636
How to change the volume/lot size (many posts)https://www.mql5.com/en/forum/11714
You have to manually adjust the: Use no more than ... % of deposit, option in signals settings, in order to keep a copying ratio of 30-35%.
There is no auto option for that.