A simple way to limit Signal bot to TOP-100, TOP-500 or TOP-1000 coin pairs

My signal bots are heavily in minus after only a few days. My thinking is that it's because the bot keeps buying coins whose market cap rank is below 2000. In other words the bot keeps bying "s**tcoins" that have always gone down and might never recover.

I'd very much appreciate a signal bot setting that allows me easily set the rank-limit, at least roughly to TOP-100, TOP-500 or TOP-1000. I think this feature would be welcomed by those non-expert traders who just want to run their bots in a "fire-and-forget"-manner.

Thanks.