In light of its Reserve currency status, How does the USA maintain the value of it currency in light of $\$800$ billion trade deficits that have accumulated to over $\$12$ trillion as pointed out by President Trump. How does it still manage to keep its reserve currency statusMarch 3, 2018
Trade deficits enable to export USD-denominated debt which is held by others, which is extremely linked to the ability to maintain reserve currency status.
If the US were to pay off all its debt, or otherwise recall all USD-denominated debt to the US, or stop other means of exporting USD, then there would be less volume and liquidity of the USD. This would tend to reduce the importance of the USD in the international system, and thus reduce its use as a reserve currency.
As for the exchange rate itself, various indicators and metrics are presumably of differing relevance in different times and contexts. But surely they can be more or less summed up by some notion of a) demand to hold/use USD and b) supply of USD-denominated financial instruments.
In sum, trade deficits help to export USD which ensures volume and liquidity that underlies the reserve status, and that liquidity itself provides a stability which underlies much demand to hold and use USD.
(Also, yes, please, check your numbers.)