Hi SciChart Team,
Thank you all for your help and support.
I finally got the multiple symbols on the stock chart with reference to this and with this clear explanation
IAnnotation annotation = builder.newCustomAnnotation().withContent(R.layout.example_custom_annotation_view).withYAxisId(PRICES).withPosition(i, prices.getHighData().get(i)).withVerticalAnchorPoint(VerticalAnchorPoint.Bottom).build();
The above code worked for me and hope it helps to others too who all are trying this.