Re: Primary/Secondary stats
Ok I can have a stab at this, but I am going from memory so may miss a couple
Potential - without question the most important stat on a horse and there are two variations of potential. The light green bar is absolute potential, this is how good the horse could be, and realised potential the dark green bar which denotes how good it is now. Potential is fluid to a degree in sofar as it can increase via either two methods, one is racing especially when they are in their 2 and 3yo seasons, the other is time so as the horse ages, so January time things will improve or rather may improve. As they get to the end of their peak, typically from 4-6 potential will start to decline yearly. Some horses will never reach their full absolute potential not matter what you do with them.
Battling Qualities - as it sounds this is how much a horse will fight for the lead when pressured, it is a hard stat to find and even harder to keep so do not be too troubled if your horses are low here.
Constitution - basically their stamina, denotes how many races a horse has in it per year. This is managed in the second stat box with the vertical lines, a horse has an available amount of energy, when trained or raced the red bar declines and the green bar increases, when race fit the green bar is at it's peak. So this simply defines how much the red bar gets hit when your fully training.
Confidence - not key but certainly a nice to have, low confidence horses can run below ability if they lose races so ideally you want something with decent confidence so results are not effected by form.
Extra speed - this is flat out speed of your horse, the shorter the distance it is suited for the more of this you will want. This really comes into play at the business end of a race. Very important stat, likely second only to potential.
Crusing Burst - this denotes the period of time a horse can run at top speed, so how long it can maintain pace for basically, tends to exist on distance horses more than sprinters but on a sprinter with good extra pace makes for the overall horse speed and can be lethal. Probably the 3rd most important stat.
Consistency - simply means how often the horse will run the same, inconsistency will make a horses performances hit and miss.
Enthusiasm - under rated in my view and one I think can make subtle differences, but basically is how willing or interested a horse is in the whole process of racing jumping and training.
Juvenile Constitution - the version of constitution when they are babies, so 2yo etc.
Finish Application - maybe the 4th most important, is how applied the horse will be at the end of the race, you really want this as high as possible
Deterioration - the only red bar on the card, is how likely the horse is to get worse as it ages, lower the better really, but a star 3yo is still a star 3yo even if by 4yo he is in decline. I avoid breeding this but have had top horses where this stat is full.
Training adaptation - how likely a horse is to take to training something new, like jumping for example
Jumping potential - how well it can jump basically, stat for the chasers. Comes with age and training.
Jumping speed - how fast it jumps, stat for your hurdlers.
Think that's the lot
Josh