Whose currency is it

The usual effect line is about a currency. Your chart is not a currency, so the line needs translating before it means anything.

Strong for the currency

When the line says a figure is strong, it is talking about the currency in the currency column. For a US release, that is the US dollar.

It is not talking about gold, about bitcoin, or about a stock index. Those are different things that happen to be measured in dollars.

The line refers to the money, not to what the money buys.

A quote has two sides

Every symbol you trade is one thing measured in another.