Profit/Loss Ticks on Chart Is Showing for the Ask

[StevenNelson]

I've been practicing with the demo for about a week. My question is about chart trading and the little box on the chart that shows the ticks of profit or loss when you are in a position.
Until yesterday, the profit loss calculation was for the bid. (Also, the profit/loss in the positions window was for the bid.) But now, it's changed to the ask. I want it for the bid. Can I fix this?

[NinjaTrader_PatrickG]

Typically, this unrealized PnL display would show you the PnL based on the last traded price. There is an option to disable this in Tools > Options > Trading > "Use last price for PnL".