Hi Andesite & welcome,

I think everyone of us has been down that similar road of chain betting .

First of all one has to take on an approach one feels comforable with.
E.g.
-Does one like to follow race to race then stop when a result is met.
-Does one prefer to lay out all bets on a few horses for the day all at once & walk away.
-Does one like to focus on one venue for the day or several venues.
-Are the bets weekend only or during the week as well.
-Whats the longest run of days experienced where not one winner was struck from ones 7 bets.
-Try & avoid runners paying less than expected price.

Here a a few ideas to consider.

If betting say your 7 horses for the day .
Stop at the first winner struck using its last start price as a divisor to take out a set amount say $100

e.g.One of your selections may have been $5.00 at its last start . Divide $5.00 into the said $100= $20 O/L on that horse & so on .

Keep using the std $100 over all your bets until one gets up then stop.
I`m sure you will strike at least 1 out of your 7 bets , this is a method on how to bet them to make a profit over time.
We are assuming the form has been done for us for the horse to justify its final last start price .

TABQ has this price info by double clicking onto the horses name & upcomes all the runners in the race with its last start TAB pricing.

If for some reason all 7 fall over on the day.
Multiply your initial $100 by 1.20 = 120 is now your new base return figure to divide into.
If this also falls over on your bets for the day , next betting day $120X1.20=$144 is the new base return figure base .
If a profit for the day go back one stage , in this case $120

One must stop at the first winner regardless weather a profit was made or not.
It is far easier to hit say 1 winner out of 8 then stop ,
than it is to hit 5 out of 8 .

The good thing with this sort of betting is that one can often get the overs on your last start price , using this as your divisor .
E.g. last start price may have been $3.20 into $100= 31 O/L & it may pay say $5.90 X 31 O/L = 183 Ret - 31 O/L = +$152 Profit.

You have made +$69 more than one would have betting to its actual price.
As most punters have experienced , it is very difficult to bet to actual price on the TAB because of the constant changes , so this is one way to work around it based on previous form .
In effect one is creating their own book against the Bookie.

This also has the benefit that one may not be placing too much on a mule with less hopfull chances of winning dispite its short price on the day .
e.g. It may have been priced at $11 last start but today its showing $2.90 if it falls over , there wont be as much damage as if one were to bet at its actual price on the day.

Its an idea to restrict ones bets for the day to 5 only instead of 7
using this process.

One could bet the overs only with this method , over your 7 horses.
E.g. If it was $3.00 last start , only bet on it if it is paying more than this figure on the day but using its last start price as the divisor so as to maximise the overlay advantage.

Like anything , it only works if one can pick a few winners.

Saying for the day:
"A Fool & his money are soon partying".

May The Punt Be With You.

Cheers.

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Cheers.