look at your ttt your key digit will always be in the same place
using 427 as an example 421
230
789*
your key digit will [always] be where i have the [ * ] sign
in the example 9 is your key digit but the mirror of 9 which is 4 might come
so you have to use 4 also, so your key digits are 9and 4 so your next draw can have a 4,or9 or both 49,or44,or 99
if you have key digits 0 mirror number is 5 so your next draw can have a 0,or5,or 00,or 55,or 05
1 mirror number is 6 1 or 6 or11,or 66, or16
2 mirror number is7 2 or 7or 22,or77 or 27
3 mirror number is 8 3 or8 or 33 or88 or38
4 mirror number is9 4 or 9or 44 or99 or49
if your next draw [does not ] have a 4 or 9 in it i would say look for doubles to come
that double can come with a 4 or 9,or 44,or,or 99,or 49
if your next draw have the [same ] key digit i would definitely look for doubles whether they be real or fake
you have to remember that a 6 can flip to 9 9 can flip to 6 , 4 can become 7 , ,9 can be come 7
you have to just back test and see what pattern works
[this is real good for triples too [ because of your key digits] you know what triple to play
in your example you would know to play triple 444,999,449,499 ]
good luck