That is a healthy-looking red line, showing about a 10% ROI adjusted. That is not yet strong statistical evidence that you are playing winning poker, but it is a good start.
Although the red line should be unbiased in one sense, and a more accurate indicator than the green line, the combination of the two may give you even more information. Usually, the red line and green line are correlated, so the red line is biased in the direction of the green line, due to uncorrected luck which affects both such as coolers and whether a draw hits on the turn when you are not all-in. Also, when you win all-in earlier in a tournament, this gives you more opportunities to use your skill advantage later in the tournament. Even if your play is exactly the same on winning days and on losing days, your red line will tend to be lower on losing days. So, seeing a high red line despite the losing green line should be quite reassuring.
Be careful that HEM has some bugs. One is a miscalculation of the all-in luck in multitable SNGs, which seems to lead to a red line which is unrealistically high. However, if these are single table tournaments then the red line should be reliable.