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// Established products: the 25% target you set for these campaigns.
// The launch rule is the same with $target_acos = 45%.
let $target_acos = 25%;
let $clicks_min = 20;   // Minimum clicks before a bid changes
let $orders_min = 3;    // Minimum orders before a bid changes
let $bid_floor = 0.25;  // Never below this bid
// Evaluate the last 7 days only when there is enough data.
let $enough_data = case(clicks(7d) >= $clicks_min and orders(7d) >= $orders_min => 1, else 0);
let $evaluation_acos = case($enough_data = 1 => acos(7d), else 99999);
// More than 20% above target: lower the bid 10%. Above target: 5%. Otherwise keep it.
let $bid_multiplier = case(
    $evaluation_acos = 99999 => 100%,
    $evaluation_acos > $target_acos * 1.2 => 90%,
    $evaluation_acos > $target_acos => 95%,
    else 100%);
let $proposed_bid = bid * $bid_multiplier;
let $new_bid = case($proposed_bid < $bid_floor => $bid_floor, else $proposed_bid);
// Only the keywords and targets whose bid would change.
state = "enabled" and $enough_data = 1 and $new_bid < bid