Using the #tw tag on any Instagram pic, your pic will be cross-posted to Twitter and appear properly, without viewer having to click through.
If
New photo by you with specific hashtag
This Trigger fires every time you share a photo on Instagram with a hashtag you specify.
Then
Post a tweet with image
This Action will post a new tweet to your Twitter account with a linked pic.twitter.com image. NOTE: Please adhere to Twitter’s Rules and Terms of Service.
Explore more great ways to automate Instagram and Twitter