We only offer the DAS simulator in 3-month subscription periods. We do not sell it on a month-to-month basis. If you want to renew it only for an extra month, you will need to renew it directly from www.dastrader.com. Note: Should you renew directly through DAS Inc., at the time of writing it will cost $150 per month without the Market Data Replay feature, or $165 per month with the Market Data Replay feature.