Tandem Diabetes Care (TNDM) Struggling to Move Back Above $38
Medical device company Tandem Diabetes Care (Nasdaq: TNDM) had an incredible run for the first eight and a half months of 2018. The stock jumped from $2.36 at the start of the year to a high of $52.55 in September. That is a gain of over 2,100%.
After hitting that all-time high in September, the stock has retreated slightly and it dipped down to a low of $26.40 in November. After dropping down to the November low, the stock has made several attempts to move back up, but it seems to be hitting resistance in the $38 area. The stock has moved above that price, but it hasn’t been able to close a day above it on three different attempts.
You can see on the chart the three attempts in just over a month and now the stock is overbought based on the daily stochastic readings. The stochastic readings also just made a bearish crossover on Wednesday.
Something that could be holding the stock back at this point is its fundamental indicators. The company has yet to turn a profit and it is currently operating at a profit margin of -67.9%.
Biotech and pharma companies are different in how they are valued by investors, but at some point the company has to start making money in order to justify the stock price. I’m not sure what that point is, but it seems like investors may have gotten ahead of themselves with Tandem when they ran it up so high last year.
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Harry Richardson — Algorithmic Trader & Strategy Developer Harry is an algorithmic trader specializing in impulse and breakout trading strategies across cryptocurrency and equity markets. With more than 10 years of experience in developing automated trading systems, he focuses on building structured algorithms designed to capture momentum while maintaining strict risk control. His approach combines quantitative analysis, real-market execution, and continuous performance monitoring. Vitalii prioritizes risk management, drawdown control, and strategy stability over short-term optimization, ensuring algorithms are adaptable to changing market conditions. He has developed and tested hundreds of automated strategies, working extensively with live trading environments, forward testing, and portfolio-level algorithm management. His work centers on transforming trading ideas into fully operational, scalable automated systems.
TNDM in downward trend: price expected to drop as it breaks its higher Bollinger Band on August 07, 2026
TNDM broke above its upper Bollinger Band on August 07, 2026. This could be a sign that the stock is set to drop as the stock moves back below the upper band and toward the middle band. You may want to consider selling the stock or exploring put options. The A.I.dvisor looked at 29 similar instances where the stock broke above the upper band. In of the 29 cases the stock fell afterwards. This puts the odds of success at .
Technical Analysis (Indicators)
Bearish Trend Analysis
The 10-day RSI Indicator for TNDM moved out of overbought territory on August 19, 2026. This could be a bearish sign for the stock. Traders may want to consider selling the stock or buying put options. Tickeron's A.I.dvisor looked at 31 similar instances where the indicator moved out of overbought territory. In of the 31 cases, the stock moved lower in the following days. This puts the odds of a move lower at .
The Stochastic Oscillator may be shifting from an upward trend to a downward trend. In of 56 cases where TNDM's Stochastic Oscillator exited the overbought zone, the price fell further within the following month. The odds of a continued downward trend are .
The Momentum Indicator moved below the 0 level on August 21, 2026. You may want to consider selling the stock, shorting the stock, or exploring put options on TNDM as a result. In of 78 cases where the Momentum Indicator fell below 0, the stock fell further within the subsequent month. The odds of a continued downward trend are .
The Moving Average Convergence Divergence Histogram (MACD) for TNDM turned negative on August 21, 2026. This could be a sign that the stock is set to turn lower in the coming weeks. Traders may want to sell the stock or buy put options. Tickeron's A.I.dvisor looked at 45 similar instances when the indicator turned negative. In of the 45 cases the stock turned lower in the days that followed. This puts the odds of success at .
Following a 3-day decline, the stock is projected to fall further. Considering past instances where TNDM declined for three days, the price rose further in of 62 cases within the following month. The odds of a continued downward trend are .
Bullish Trend Analysis
The 10-day moving average for TNDM crossed bullishly above the 50-day moving average on July 20, 2026. This indicates that the trend has shifted higher and could be considered a buy signal. In of 18 past instances when the 10-day crossed above the 50-day, the stock continued to move higher over the following month. The odds of a continued upward trend are .
Following a 3-day Advance, the price is estimated to grow further. Considering data from situations where TNDM advanced for three days, in of 272 cases, the price rose further within the following month. The odds of a continued upward trend are .
The Aroon Indicator entered an Uptrend today. In of 151 cases where TNDM Aroon's Indicator entered an Uptrend, the price rose further within the following month. The odds of a continued Uptrend are .
Fundamental Analysis (Ratings)
The Tickeron Seasonality Score of (best 1 - 100 worst) indicates that the company is slightly undervalued in the industry. The Tickeron Seasonality score describes the variance of predictable price changes around the same period every calendar year. These changes can be tied to a specific month, quarter, holiday or vacation period, as well as a meteorological or growing season.
The Tickeron Price Growth Rating for this company is (best 1 - 100 worst), indicating steady price growth. TNDM’s price grows at a higher rate over the last 12 months as compared to S&P 500 index constituents.
The Tickeron PE Growth Rating for this company is (best 1 - 100 worst), pointing to worse than average earnings growth. The PE Growth rating is based on a comparative analysis of stock PE ratio increase over the last 12 months compared against S&P 500 index constituents.
The Tickeron Valuation Rating of (best 1 - 100 worst) indicates that the company is significantly overvalued in the industry. This rating compares market capitalization estimated by our proprietary formula with the current market capitalization. This rating is based on the following metrics, as compared to industry averages: P/B Ratio (11.905) is normal, around the industry mean (11.035). P/E Ratio (0.000) is within average values for comparable stocks, (70.949). Projected Growth (PEG Ratio) (0.000) is also within normal values, averaging (4.006). TNDM has a moderately low Dividend Yield (0.000) as compared to the industry average of (0.017). P/S Ratio (1.463) is also within normal values, averaging (34.463).
The Tickeron SMR rating for this company is (best 1 - 100 worst), indicating weak sales and an unprofitable business model. SMR (Sales, Margin, Return on Equity) rating is based on comparative analysis of weighted Sales, Income Margin and Return on Equity values compared against S&P 500 index constituents. The weighted SMR value is a proprietary formula developed by Tickeron and represents an overall profitability measure for a stock.
The Tickeron Profit vs. Risk Rating rating for this company is (best 1 - 100 worst), indicating that the returns do not compensate for the risks. TNDM’s unstable profits reported over time resulted in significant Drawdowns within these last five years. A stable profit reduces stock drawdown and volatility. The average Profit vs. Risk Rating rating for the industry is 95, placing this stock worse than average.
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General Information
a developer and manufacturer of medical devices for the treatment of diabetes
Industry MedicalNursingServices
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