Update README.md

Author: trunghaonguyennasdaq

README.md

@@ -21,7 +21,7 @@ This repository provides an SDK for developing applications to access Nasdaq Dat
 #### Nasdaq Canada
 - [Nasdaq Canada Basic](http://www.nasdaqtrader.com/content/technicalsupport/specifications/dataproducts/Nasdaq-Basic-Canada-Cloud-Specification.pdf)
 #### OTC Markets
-- [OTC Markets](http://www.nasdaqtrader.com/content/technicalsupport/specifications/dataproducts/OTCM-cloud.pdf)
+- [OTC Markets](http://www.nasdaqtrader.com/content/technicalsupport/specifications/dataproducts/OTCM-cloud.pdf) (real-time & delayed)
 ### Indexes & ETPs
 - [Global Index Data Service](http://www.nasdaqtrader.com/content/technicalsupport/specifications/dataproducts/GIDS_Cloud.pdf)
 ### Options