Reduction Factor Error

[thonggruss]

Hi Gruss,

Just spot a question about Reduction Factor and i hope you can give some advise

In horse racing market I wrote a macro to BACK and LAY automatically, I tried to BACK @ 3.4, if this BACK bet is matched then lay-2-tick-below, else if lay-2-tick-below is not matched then LAY at @3.4 at off time.

it runs well until today i face a problem with reduction factor,

so when i check my bet, my BACK bet is matched at 2.96 (Reduction Factor 12.80%), and i have a LAY bet matched at 3.40, I guess this is because BACK@ 3.4 is matched, RF happened, change my lay bet to 2.87 (initially is 3.3), this lay-2-tick-below is not matched hence macro automatically lay @3.4

my questions are
1. how can i prevent this while RF happened? so that macro can automatically lay @ 2.96 or lay 2-tick-lower then 2.96 when it spot RF? will the sequence of the RF happened affect the lay odds? (compare case 2 & 3)?

2. if i use BACK-T2 @3.4, if the back bet 3.4 is matched and RF happened, what will be the odd of lay bet? will the "Avg matched odds" shows 3.4 or 2.96?

3. if i use BACK-T2 @3.4, RF happened, then the back bet is matched @2.96 , what will be the odd of lay bet? (RF happened at different sequence compare to case 2)

this take me awhile to think yet i cant figure out the answer, i hope you can give me some advise. thank you