There are 3 reasons why your software might be taking higher than normal lot size trades.
- Traide Ringer Functionality: The software will take slightly higher lot size trades in an attempt to get you out of losing trades faster. These trades are known as cost averaging or hedging trades. This is completely normal for the software to do this. Generally, the "traide ringer" software will take trades about 1.5X bigger than the previous trade on the same pair.
- DiMarti: Perhaps you noticed that word in the Traide Ringer inputs. The best value to have there is 1.5. This is what determines the increasing lot size in trades. If you have this setting too high then your lot sizes will increase quickly and can exhaust your account. Too low and the software may not be able to trade you out of drawdown effectively.
- Broker manipulation: As sad as it sounds brokers that are not A-book brokers will manipulate your trades in an attempt to make you lose. Non-A-book brokers make money when you lose money. These brokers are known for increasing lot size, fudging with taking profit marks and missing stop loss marks.