My second indicator in this series is Slices of Bitcoin, a very simple indicator that shows how many times a currency fits into Bitcoin. Here is the source code.
In other words, the higher the value of indicator, the weaker the currency against Bitcoin.
You can easily see that since the beginning of 2019 Stellar Lumen (XLM) lost half of its BTC value while the USD value was constant.
Trade short and prosper!