Please check the settings to be enabled on NinjaTrader

1) Checkmark Multi-provider: Tools/ Options/General/ Properties: Checkmark Multi-provider

2) Checkmark Show Tick Replay: Tools/ Options/General/ Properties: Checkmark Show Tick Replay

Checkmark Multi-provider: click the image to make it larger 

Checkmark Show Tick Replay: lick the image to make it larger 
Multi Provider NinjaTrader Connection- click to maximize