this is what snowy uses

chance  = 95
loss    = 0
nextbet = balance/5000000
prebet  = balance/5000000
bethigh = true
mick    = 0
nick    = 0
lose    = 0
function dobet()
if win then
    lose     = 0
    nextbet  = balance/5000000
    chance   = 95
    bethigh  = true
  nick += 1
else
    loss += 1
    lose += 1
  mick += 1
 nick = 0
end
if nick > 7 then
    mick = 0
end
if (lose > 0) and (chance==95) then
    nextbet = previousbet*21
    lose += 1
end
if (loss >= 2) and (mick > 1) then
    chance  = 5
    nextbet = previousbet*1.1
    bethigh = false
    mick    = 0
    loss    = 0
end
    if win and (chance==5) then
        chance = 95
    end
    if (lose == 5) and (chance==5)then
        chance  = 95
        nextbet = previousbet*100
        mick    = 0
        bethigh = true
end
    if (lose == 10) and (chance==5)then
        chance  = 95
        nextbet = previousbet*100
        mick    = 0
        bethigh = true
    end
    if (lose == 15) and (chance==5)then
        chance  = 95
        nextbet = previousbet*100
        mick    = 0
        bethigh = true
    end
    if (lose > 20) and (chance==5)then
        chance  = 95
        nextbet = previousbet*100
        mick    = 0
        bethigh = true
end
end