You’re not a coder, but you know how to read, don’t you understand that I gave you the solution in my first reply? You just have to add the command and then call it with the horoscope sign you want: !horoscope leo for example.
Read the documentation if you don’t understand, here, this time I link you to exactly what you need to read.
I gave you a link to the documentation in my first reply, it’s up to you to look for the information if you want to know what $(1) does, the reason why I didn’t give you the direct link to the description of what it does is for you to read the entire documentation and learn how to bot works so you gain in autonomy to make your own commands, in my second reply I told you what it does because you didn’t take 5min to look it up yourself in the documentation.
You didn’t say it didn’t work, but you didn’t say it worked either, your questions made it feel like you didn’t even try the command, if you said thanks for the command and asked why we use $(1), that would have been far better, instead you went on a number the forum adds to the link to count the number of times it was clicked, which was irrelevant because I completely ignored when I wrote the command, that’s why my second answer aims to answer why we use $(1) in a few words, which is just me repeating my first answer really:
It can’t be clearer than that: we use $(1) to send data to the API because it needs to be sent something to work.