I have been following this data since the 1970s and the data has not missed predicting a recession a single time. Nine times the 3-Month Treasury Bill: the Secondary Market rate was greater than the 10-Year Treasury Constant Maturity Rate and there was a recession close by.
I have used an app from the St. Louis Federal Reserve that shows this data along with recessions since the 1960s in a simple to read chart. As you will note in the chart the data does not indicate a recession is immediate as of 11/26/2018. The data is automatically updated.
Even though this data has proved accurate in the past there is no absolute assurance of success again or exactly when the recession indicated will occur. Therefore use at your own risk.