Are you seeing the ret when you put to cosm? ret = 200 means a kosher transfer. If you get that but see nothing in the graph, it could be the data is suss. You can test just before you send
Serial.println(datastreams[0]);
Serial.println("Uploading it to Cosm");
ret = cosmclient.put(feed, cosmKey); // SEND FEED TO COSM
Serial.print("cosmclient.put returned "); // 200?
Serial.println(ret);