Below is the S&P 500 Futures hourly Renko chart. The RSI is sitting at around 70. Based on the past performance, the index might be able to go up another 20+ points from here depending on the momentum before taking a breather. The projected high looks like somewhere between 3998 and 4020 for Futures. Then, it might retrace 20 to 30 points before moving up again.
On the daily Renko chart, the move up would be even more impressive. The projected high looks like somewhere between 4080 and 4120 for Futures.