Buys double amount whenever price decreases by 20% and for each buy order a 20% higher sell order is created.
Buys double amount whenever price decreases by 20% and whenever the price increases by 20%, everything, except 100EUR worth of stock is sold.
Spends a given amount of money on stock at regular intervals (cost averaging), sells everything when the price is 20% higher than the average buy price so far.