I have many telegram channels, 24\7 they send messages in the format 

"buy usdjpy sl 145.2 tp 167.4"  
"eurusd sell sl 145.2 tp 167.4" 
"eurusd sl 145.2 tp 167.4 SELL"

or these words in some order
My idea is to create app that checks every channel's message, and redirects it to my channel if it is in the above format.
Does telegram api allow it?
You cannot scrape from a telegram channel with a bot, unless, the bot is an administrator in the channel, which only the owner can add.
Once that is done, you can easily redirect posts to your channel by listening for channel_post updates.
How can I redirect messages from telegram channels that are in certain format?[telegram bot]