I haven't been trading much on Saturdays at all, so spent most of today just watching the markets (that is good practice in itself if you can analyse how markets typically react).
Avoiding the ITV races (which may drift a bit), it is generally better to back the favourites, because on Saturdays, lots of casual punters think they can win by betting on a horse favourite.
This can create many downward trends. The hard part is judging the timing of when to enter.
I only traded 4 races, due to a lack of confidence, but have still earned a profit of 29p. Learned a lot today.