there are many ordeflow systems available for ninjatrader.
marketdelta is good but expensive and works on few data feeds.
GOMI is free and download available in this forum threads.
all OFA softwares works similarly.
you can learn the basics from following video
https://www.youtube.com/watch?v=to1StvJaQa4
download minimum 480p or 720p better.
download with YOUTUBEDOWNLOADER HD free software.
keep it for reference.
watch this video same rules apply for any ofa software
my main strategy is using OFA with volume profile and TPO.
for data i am using yusi utulity which gives both bid and ask prices.
GDFL is some problem in opening multiple time frames of same symbol.
i am following 1mnt 5mnt 15mnt and 60mnt
i will post my charts latter.