There are 3 states of arrows on Credit Score widget:

Upwards pointing Green arrow is visible: Since the previous score fetch, your Credit Score has increased

Downwards pointing Red arrow is visible: Since the previous score fetch, your Credit Score has decreased

Both Green and Red arrows are visible: This appears in two cases, either when Credit Report has been fetched for the first time on Tata Neu, or when Credit Score hasn’t changed since the last score fetch on Tata Neu.