Has anyone ever had trades attributed to them that they didn't place. I was trading ES using jtrader this morning and logged out around noon. When I logged on PM, I had a position in the mkt that I didn't place. When I contacted my broker, he said they were from my logon and were my orders - and referred me to the trade details in my status screen, which showed them to be my trades. I am as sure as I can be that I didn't place the trades. Even if I left limit orders by mistake, I would have been given a warning popup when logging out. I have been using the same broker & platform for over a year now and nothing like this has happened before. My question is, has this happened to anyone else - and what was the outcome?