Pyramiding: Gradually increase your position as prices fall to average out your costs. This helps reduce risk because you buy closer to the bottom of the market.

Inverted pyramiding: Gradually reduce your position as prices rise to lock in some profits. This helps to realize profits when prices reach their peak.

Buy when prices rise, reduce when prices fall: Increase your position when prices rise, and gradually reduce your position when prices fall. This helps reduce risk and make more profits when the market trend is clear.