I am using a tool name Trackmyhashtag. It is the best social media analytics tool which tracks and helps to manage the activities and happenings around a topic. Trackmyhashtag has great features :
1. Track real-time analytics
2. Fetch historical Twitter data
3. Track and identify influencers
4. Track competitors' analytics
5. Track Twitter hashtag campaign's
Trackmyhashtag offers a 5-days free trial in which you can track any 2 hashtag, keyword or account and get useful analytics.
I hope you'll find this tool useful. Do visit and try to use it!
Thank you!