Stream Order using ArcGIS / Strahler Method - 2019 

Generate Stream Order from DEM using ArcGIS (2019)
Step 1: Fill Tool - Input -- DEM Data
Step 2: Flow Direction - Input -- Fill Data
Step 3: Flow Accumulation - Input -- Flow Direction Data
Step 4: Classify -- Flow Direction into 2 types -- color 1st category with -- Blue
Step 5: Map Algebra Tool - Input -- Formula "Flow Accumulation less than 100"
Step 6: Stream Order - Input -- Output from Map Algebra & Flow Direction
Step 7: Stream to Feature - Input -- Output from Stream Order & Flow Direction
Step 8: Data Management Tool -- Generalization -- Use Dissolve Tool (within the tool select "gridcode"
Step 9: Stream Order is Generated -- Classify the data using symbology tool and categories the stream.