Spearman's rank correlation coefficient
always gives an answer between −1 and 1. The numbers between are like a scale, where −1 is a very strong link, 0 is no link, and 1 is also a very strong link. The difference between 1 and −1 is that 1 is a positive correlation, and −1 is a negative correlation.  A graph of data with a  value of −1 would look like the graph shown except the line and points would be going from top left to bottom right.