Certainly. Most indicators have a validity range. Look at the simple moving average, SMA(100). It is invalid between bars 0-98 and valid from bar 99 on. This is no bug and has nothing to do with wrong trades. It is just due to the definition of the indicator and the fact that data does not exist before bar 0.

What I suggested was simply not plotting invalid indicator values. I hope that you're not trading them anyway.