Finabot on Telegram (or command-line mode!) looks something like this when running command /latest. Finabot uses Yahoo Finance API so all ticker symbols must use the same format as Yahoo Finance uses. For example, in Nasdaq OMX Helsinki ticker symbols use .HE in the end, such as WITTED.HE or KEMPOWR.HE.

If the market is open, ticker symbol is ALL-CAPS, otherwise it's all lowercase.

msft    338.37  2.31% 🟢
trow    126.79  8.27% 🟢
vz       34.03 -1.43% 🔴
WITTED    3.05  1.32% 🟢
KEMPOW   40.87 -0.10% 🔴
tsla    266.44  4.20% 🟢

• Please understand that this is just an experimental bot, run this at your own risk
• It is completely under mercy of Yahoo Finance API
• Works on just channel per bot (and fills my use case perfectly)
• Code is just one big file
• Class Finabot has just too many responsibilities
• Uses Yahoo Finance API through basic_yahoo_finance gem
• Not tested on Telegram channels
• Probably works just on happy case path
• It does not have any error handling, it just crashes

If you want to run this locally without connecting to Telegram, use --cli option.

    $ ruby finabot.rb --cli

or running from command-line

    $ ruby finabot.rb /help
    $ ruby finabot.rb /add WITTED.HE
    $ ruby finabot.rb /latest
    $ ruby finabot.rb /info WITTED.HE

Same commands work, so start with /help.

• Create the bot on Telegram Telegram Bots
• Grab the Telegram API token
• Make the bot Inline so it replies on the group (like Irc bots back in the day)
• Invite the bot to a channel
• Start the finabot with command-line argument --telegram

    $ API_TOKEN=<your-telegram-api-token> ruby finabot.rb --telegram

• Test with /help command, type it on the group and the bot should print the list of available commands. Remember, you run the bot at your own risk.

When starting the bot, it loads the ticker symbols from tickers.txt. Finabot saves the ticker symbols into same file when ticker symbols are added or removed.