USDTUSD@coinbase as Short Term Gauge for BTCUSDT@binance

dear fellows,

we've recently identified a leading to coincident relationship between BTCUSDTBinance and USDTUSD@coinbase.
although they do not always match, BTCUSDT tends to converge to USDTUSD in a matter of hours, when there is a gap, and follow it closely or soon after, otherwise.
we've observed that new lows or new highs in USDTUSD are indications of immediate revisiting tops and bottoms in BTCUSDT.

thank you and best regards.